昔、私は、たとえばクラフトワークの歌「Die Roboter」のように、「ロボットの声」を使って音声合成装置を作成するというアイデアを訪れました。 「ロボットの声」に関する情報の検索により、このような合成音声の音は音声の圧縮に使用されるボコーダーの特徴であるという歴史的な事実につながりました（2400-9600ビット/秒）。 ボコーダーによって合成された人間の声は金属音を発し、非常に同じ「ロボットの声」に似ています。 ミュージシャンはこの音声の歪みの効果を気に入っており、仕事で積極的に使用し始めました。
ボコーダーの実装に関する情報を検索した結果、 「デジタル信号処理の理論と応用」という本が見つかりました。この本では、ボコーダーに基づいて独自の音声シンセサイザーを作成するために必要なほぼすべてを説明しています。
音声合成の実装方法の選択に関する小さなコメント
もちろん、ボコーダーの作成について心配する必要はありませんが、単にすべての音素の事前に録音された音のデータベースを作成し、テキストに従ってそれらを再生します。 この方法は私にとって面白くないので、子音と母音の両方のすべての音を合成する音声シンセサイザーを作成することにしました。 これらの目的のボコーダーが選ばれたのは、フォルマント音声シンセサイザーよりもトレーニングが簡単だからですが、どちらの場合も音は私が必要とするものです。 さらに、おそらくサウンドの合成により、外部メモリなしでstm32マイクロコントローラーをベースにした音声シンセサイザーを実装できます！ ここでの問題は、むしろMKの速度が十分かどうかです。
スポイラーの下で、ボコーダーによる音声処理の結果が表示されます
ボコーダー操作の簡単な理論
ボコーダーの最も基本的な部分は、バンドパスフィルターの櫛です。 合成音声のスペクトルを形成するか、逆に、デバイスの受信部分で人間の自然な音声のスペクトルレベルを決定するのは彼女です。 ボコーダーの送信部分と受信部分の両方に、バンドパスフィルターのコームが含まれています。
ボコーダーの人間の音声部分は、音のスペクトルに加えて、音がうるさいか、音があるかを決定します。 トーンの場合、その周期が決定されます。 バンドパスフィルターの出力からの信号は検出され、ローパスフィルターを通過し、ボコーダーの合成部分のバンドパスフィルター上の信号を変調するための係数として使用されます。
ボコーダーの合成部分には、ノイズおよびトーンジェネレーター（読み取り：シフトレジスタと蛇行ジェネレーターに基づく乱数シーケンスジェネレーター）、およびこれら2つのジェネレーター間のスイッチが含まれています。 2つのジェネレーターの1つからの信号は、バンドパスフィルター櫛の入力に供給されます。 入力フィルターごとに、トーンまたはノイズジェネレーターからの信号は適切な係数で変調されます。 そして最後に、すべてのフィルターの出力から、信号を要約し、合成された音声を取得します。
誰かがボコーダーの私の説明を理解していない場合、ここにブロック図があります：
それほど単純ではない
ボコーダー
フィルター間で周波数を分配する方法については...人間の音声の主な周波数は、最大で約4〜5 kHzの範囲です（非常に近似的）。 4 kHzの制限を取り、音の「チョーク」の音程の心理物理学的測定単位を使用して、ヘルツではなくチョークで均等に分配しました。
このような音声合成方法を提供するものは何ですか？
バンドパスフィルターの変調係数がフィルター番号によって「シフト」される場合、男性の女性の音声から取得できます。 そして、これは、周波数領域の（私のボコーダー実装における）フィルター範囲が均等に分散されていないという事実にもかかわらずです。
スピーチのイントネーションを変更することもできます。通常はすべてを変更できます。 唯一のマイナスは、
ここで、女性のスピーチが男性のスピーチにどのように変化するかを聞くことができます。
女性の声は変わらない（単調）
女性からの男性の声（単調）
そして、男性の声がさらに男性的になったとしたら？
非常に男性的な声（単調）
いくつかのコード
まだすべてのコードを投稿するつもりはありません（まだ音声合成装置を追加していないので、2番目の記事があります）。 以下は、ピッチのピッチを決定するためのコードです（トーンまたはノイズも決定できます）。 このために、信号のエントロピー、600 Hzでのローパスフィルター後の信号のエントロピー（トーンの周波数領域内）、およびトーン周期の行列式の正しい一致の数が測定されます。
ピッチのピッチを決定するためのコード。
#include <math.h> #include <stdio.h> /* speesy_Entropy_f - ( ) speesy_GetBasicTone - speesy_GetAllCoincidence - speesy_GetBasicToneEntropy - speesy_SetFreqMeander - speesy_Meander - */ #define SPEESY_SAMPLE_FREQ8 8000 #define SPEESY_SAMPLE_FREQ16 16000 #define SPEESY_SAMPLE_FREQ SPEESY_SAMPLE_FREQ16 #define SPEESY_MEANDER_MAX 100 #define FOR_FLOAT_EPSILON 1.19209e-007 static float speesy_all_coincidence = 0; // static float speesy_fliter600_Entropy = 1.0; static float speesy_meander_period = 0.01;// float speesy_Entropy_f(const float* source, unsigned long int start, unsigned long int finish, unsigned char binsCount, float minRaw, float maxRaw) { float entropy = 0; float binSize = fabs(maxRaw - minRaw) / (float)binsCount; //FOR_FLOAT_EPSILON == numeric_limits<float>::epsilon() if (fabs(binSize) < FOR_FLOAT_EPSILON) { return 0; } //float* p = new float[binsCount]; float p[256]; for (unsigned char i = 0; i < binsCount; i++) { p[i] = 0.0; } // Calculate probabilities unsigned char index; float value; for (unsigned long int i = start; i <= finish; i++) { value = source[i]; //for 8-bit data index = floor((value - minRaw) / binSize); if (index >= binsCount) { index = binsCount - 1; } p[index] += 1.0; } unsigned char Normalize_size = finish - start + 1; for (unsigned char i = 0; i < binsCount; i++) { p[i] /= Normalize_size; } for (unsigned char i = 0; i < binsCount; i++) { if (p[i] > FOR_FLOAT_EPSILON) { entropy += p[i] * log2(p[i]); } } entropy = -entropy; return entropy; } float speesy_GetBasicTone(float source) { static float matrix[6][6] ={0,0,0,0,0,0, 0,0,0,0,0,0, 0,0,0,0,0,0, 0,0,0,0,0,0, 0,0,0,0,0,0, 0,0,0,0,0,0}; const float max_detector_p = 0.0255; const float min_detector_p = 0.0016; static float detector_p[6] = {min_detector_p}; static float detector_old_p[6] = {min_detector_p}; static float detector_t[6] = {0}; static float detector_tay[6] = {0.016}; static float detector_t_end = 0; //static float detector_beta[6] = {0}; static float detector_value[6] = {0}; float f_data = 0; //char detector_p_t0_f = 0; static float sig_old = 0; static char sig_p = 0; static char sig_m = 0; static unsigned short tim160 = 0; float detector_m1; float detector_m2; float detector_m3; float detector_m4; float detector_m5; float detector_m6; int detector_data = 0; static float detector_old_m1; static float detector_old_m4 = 0; static char speesy_tone_i = 0; static char speesy_tone_x = 0; static char speesy_tone_y = 0; static char speesy_tone_inter = 0; //char n_coincidence[4] ={0}; char n_coincidence_matrix[6][4] ={0}; static float out_t; #if SPEESY_SAMPLE_FREQ == SPEESY_SAMPLE_FREQ8 static float source_data[16] = {0}; const int max_source_data = 16; const float p_conts = 0.000125; #endif // SPEESY_SAMPLE_FREQ #if SPEESY_SAMPLE_FREQ == SPEESY_SAMPLE_FREQ16 static float source_data[32] = {0}; const int max_source_data = 32; const float p_conts = 0.0000625; #endif // SPEESY_SAMPLE_FREQ /*************Filter 600 Hz**********************/ #if SPEESY_SAMPLE_FREQ == SPEESY_SAMPLE_FREQ8 const float filter600_ACoef1[5] = { 0.00161978575856732190, 0.00647914303426928760, 0.00971871455140393280, 0.00647914303426928760, 0.00161978575856732190 }; const float filter600_BCoef1[4] = { -2.63228606617055720000, 2.68865140959361830000, -1.25580694576241330000, 0.22536111137571077000 }; #endif // SPEESY_SAMPLE_FREQ #if SPEESY_SAMPLE_FREQ == SPEESY_SAMPLE_FREQ16 const float filter600_ACoef1[5] = { 0.00013538805748957640, 0.00054155222995830559, 0.00081232834493745844, 0.00054155222995830559, 0.00013538805748957640 }; const float filter600_BCoef1[4] = { -3.29078386336302660000, 4.09122986596582550000, -2.27618508727807440000, 0.47792443748067198000 }; #endif // SPEESY_SAMPLE_FREQ static float filter600_y[5] = {0}; //output samples static float filter600_x[5] = {0}; //input samples static float out_filter600[240] = {0}; short out_i = 0; filter600_x[4] = filter600_x[3]; filter600_y[4] = filter600_y[3]; filter600_x[3] = filter600_x[2]; filter600_y[3] = filter600_y[2]; filter600_x[2] = filter600_x[1]; filter600_y[2] = filter600_y[1]; filter600_x[1] = filter600_x[0]; filter600_y[1] = filter600_y[0]; filter600_x[0] = source; filter600_y[0] = filter600_ACoef1[0] * filter600_x[0]; filter600_y[0] += filter600_ACoef1[1] * filter600_x[1] - filter600_BCoef1[0] * filter600_y[1]; filter600_y[0] += filter600_ACoef1[2] * filter600_x[2] - filter600_BCoef1[1] * filter600_y[2]; filter600_y[0] += filter600_ACoef1[3] * filter600_x[3] - filter600_BCoef1[2] * filter600_y[3]; filter600_y[0] += filter600_ACoef1[4] * filter600_x[4] - filter600_BCoef1[3] * filter600_y[4]; /***************End Filter 600 Hz*********************/ for (out_i = 239;out_i>0; out_i--) { out_filter600[out_i] = out_filter600[out_i - 1]; } out_filter600[0] = filter600_y[0]; if (tim160 < 160) {tim160 = tim160 + 1;} else { tim160 = 0; speesy_fliter600_Entropy = speesy_Entropy_f(out_filter600,0,159,255,-32768,32768); speesy_fliter600_Entropy = speesy_Entropy_f(out_filter600,160,239,255,-32768,32768); } detector_m1 = 0; detector_m2 = 0; detector_m3 = 0; detector_m4 = 0; detector_m5 = 0; detector_m6 = 0; //printf("\nSpeesy max_source_data = %d\n",max_source_data); if (filter600_y[0] >= 0) { if (filter600_y[0] > sig_old) {sig_p = 1;} else { if (sig_p == 1) { sig_p = 0; detector_m1 = filter600_y[0]; if (detector_m1 > detector_old_m1) { detector_m3 = detector_m1 - detector_old_m1; } else detector_m3 = 0; detector_m2 = detector_m1 + detector_old_m4; detector_old_m1 = detector_m1; } } sig_old = filter600_y[0]; } else { if ((-filter600_y[0]) > sig_old) {sig_m = 1;} else { if (sig_m == 1) { sig_m = 0; detector_m4 = -filter600_y[0]; if (detector_m4 > detector_old_m4) { detector_m6 = detector_m4 - detector_old_m4; } else detector_m6 = 0; detector_m5 = detector_m4 + detector_old_m1; detector_old_m4 = detector_m4; } } sig_old = -filter600_y[0]; } /*****************************************************/ //6 if (detector_t[5] > detector_tay[5]) { // tay f_data = detector_value[5]*(exp(-(detector_t[5] - detector_tay[5])/(detector_p[5]/0.695))); // if (detector_m6 > f_data) { // detector_value[5] = detector_m6; // detector_p[5] = (detector_t[5] + detector_p[5])/2; // if (detector_p[5] > max_detector_p) detector_p[5] = max_detector_p; if (detector_p[5] < min_detector_p) detector_p[5] = min_detector_p; detector_tay[5] = 0.4*detector_p[5]; // detector_t[5] = 0; //detector_p_t0_f = 1; matrix[5][2] = matrix[5][1]; matrix[5][1] = matrix[5][0]; matrix[5][0] = detector_p[5]; } else { detector_t[5] = detector_t[5] + p_conts; // } } else { detector_t[5] = detector_t[5] + p_conts; } //5 if (detector_t[4] > detector_tay[4]) { // tay f_data = detector_value[4]*(exp(-(detector_t[4] - detector_tay[4])/(detector_p[4]/0.695))); // if (detector_m5 > f_data) { // detector_value[4] = detector_m5; // detector_p[4] = (detector_t[4] + detector_p[4])/2; // if (detector_p[4] > max_detector_p) detector_p[4] = max_detector_p; if (detector_p[4] < min_detector_p) detector_p[4] = min_detector_p; detector_tay[4] = 0.4*detector_p[4]; // detector_t[4] = 0; //detector_p_t0_f = 1; matrix[4][2] = matrix[4][1]; matrix[4][1] = matrix[4][0]; matrix[4][0] = detector_p[4]; } else { detector_t[4] = detector_t[4] + p_conts; // } } else { detector_t[4] = detector_t[4] + p_conts; } //4 if (detector_t[3] > detector_tay[3]) { // tay f_data = detector_value[3]*(exp(-(detector_t[3] - detector_tay[3])/(detector_p[3]/0.695))); // if (detector_m4 > f_data) { // detector_value[3] = detector_m4; // detector_p[3] = (detector_t[3] + detector_p[3])/2; // if (detector_p[3] > max_detector_p) detector_p[3] = max_detector_p; if (detector_p[3] < min_detector_p) detector_p[3] = min_detector_p; detector_tay[3] = 0.4*detector_p[3]; // detector_t[3] = 0; //detector_p_t0_f = 1; matrix[3][2] = matrix[3][1]; matrix[3][1] = matrix[3][0]; matrix[3][0] = detector_p[3]; } else { detector_t[3] = detector_t[3] + p_conts; // } } else { detector_t[3] = detector_t[3] + p_conts; } //3 if (detector_t[2] > detector_tay[2]) { // tay f_data = detector_value[2]*(exp(-(detector_t[2] - detector_tay[2])/(detector_p[2]/0.695))); // if (detector_m3 > f_data) { // detector_value[2] = detector_m3; // detector_p[2] = (detector_t[2] + detector_p[2])/2; // if (detector_p[2] > max_detector_p) detector_p[2] = max_detector_p; if (detector_p[2] < min_detector_p) detector_p[2] = min_detector_p; detector_tay[2] = 0.4*detector_p[2]; // detector_t[2] = 0; //detector_p_t0_f = 1; matrix[2][2] = matrix[2][1]; matrix[2][1] = matrix[2][0]; matrix[2][0] = detector_p[2]; } else { detector_t[2] = detector_t[2] + p_conts; // } } else { detector_t[2] = detector_t[2] + p_conts; } //2 if (detector_t[1] > detector_tay[1]) { // tay f_data = detector_value[1]*(exp(-(detector_t[1] - detector_tay[1])/(detector_p[1]/0.695))); // if (detector_m2 > f_data) { // detector_value[1] = detector_m2; // detector_p[1] = (detector_t[1] + detector_p[1])/2; // if (detector_p[1] > max_detector_p) detector_p[1] = max_detector_p; if (detector_p[1] < min_detector_p) detector_p[1] = min_detector_p; detector_tay[1] = 0.4*detector_p[1]; // detector_t[1] = 0; //detector_p_t0_f = 1; matrix[1][2] = matrix[1][1]; matrix[1][1] = matrix[1][0]; matrix[1][0] = detector_p[1]; } else { detector_t[1] = detector_t[1] + p_conts; // } } else { detector_t[1] = detector_t[1] + p_conts; } //1 if (detector_t[0] > detector_tay[0]) { // tay f_data = detector_value[0]*(exp(-(detector_t[0] - detector_tay[0])/(detector_p[0]/0.695))); // if (detector_m1 > f_data) { // detector_value[0] = detector_m1; // detector_p[0] = (detector_t[0] + detector_p[0])/2; // if (detector_p[0] > max_detector_p) detector_p[0] = max_detector_p; if (detector_p[0] < min_detector_p) detector_p[0] = min_detector_p; detector_tay[0] = 0.4*detector_p[0]; // detector_t[0] = 0; //detector_p_t0_f = 1; matrix[0][2] = matrix[0][1]; matrix[0][1] = matrix[0][0]; matrix[0][0] = detector_p[0]; } else { detector_t[0] = detector_t[0] + p_conts; // } } else { detector_t[0] = detector_t[0] + p_conts; } /************************************************************************/ if (detector_t_end == 0) { for (speesy_tone_x = 0;speesy_tone_x<6;speesy_tone_x++) { matrix[speesy_tone_x][3] = matrix[speesy_tone_x][0] + matrix[speesy_tone_x][1]; matrix[speesy_tone_x][4] = matrix[speesy_tone_x][1] + matrix[speesy_tone_x][2]; matrix[speesy_tone_x][5] = matrix[speesy_tone_x][1] + matrix[speesy_tone_x][2] + matrix[speesy_tone_x][0]; } for (speesy_tone_inter = 0; speesy_tone_inter<4;speesy_tone_inter++) { n_coincidence_matrix[0][speesy_tone_inter] = 0; n_coincidence_matrix[1][speesy_tone_inter] = 0; n_coincidence_matrix[2][speesy_tone_inter] = 0; n_coincidence_matrix[3][speesy_tone_inter] = 0; n_coincidence_matrix[4][speesy_tone_inter] = 0; n_coincidence_matrix[5][speesy_tone_inter] = 0; for (speesy_tone_x = 0;speesy_tone_x<6;speesy_tone_x++) { for (speesy_tone_y = 0;speesy_tone_y<6;speesy_tone_y++) { //printf("\nValue_matrix %f",matrix[speesy_tone_x][speesy_tone_y]); //printf("\nmatrix %f",(float)matrix[speesy_tone_x][speesy_tone_y]); for (speesy_tone_i = 0;speesy_tone_i<6;speesy_tone_i++) { //printf("\nmatrix %f",(float)matrix[speesy_tone_x][speesy_tone_y]); //printf("\nspeesy_tone_i %d",speesy_tone_i); //printf("\nsr matrix %f",(float)matrix[speesy_tone_i][0]); if (((speesy_tone_y != 0)&(speesy_tone_x!=speesy_tone_i))|(speesy_tone_y > 0)) if ((matrix[speesy_tone_i][0] >= 0.0016)&(matrix[speesy_tone_i][0] <= 0.0031)) { f_data = 0.0001*((float)speesy_tone_inter + 1.0); if ((((float)matrix[speesy_tone_i][0] + (float)f_data) >= (float)matrix[speesy_tone_x][speesy_tone_y])& (((float)matrix[speesy_tone_i][0] - (float)f_data) <= (float)matrix[speesy_tone_x][speesy_tone_y])) { n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] = n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] + 1; //printf("\ncoincidence 0.0016 - 0.0031"); } } else if ((matrix[speesy_tone_i][0] > 0.0031)&(matrix[speesy_tone_i][0] <= 0.0063)) { f_data = 0.0002*((float)speesy_tone_inter + 1.0); if ((((float)matrix[speesy_tone_i][0] + (float)f_data) >= (float)matrix[speesy_tone_x][speesy_tone_y])& (((float)matrix[speesy_tone_i][0] - (float)f_data) <= (float)matrix[speesy_tone_x][speesy_tone_y])) { n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] = n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] + 1; //printf("\ncoincidence 0.0031 - 0.0063"); } } else if ((matrix[speesy_tone_i][0] > 0.0063)&(matrix[speesy_tone_i][0] <= 0.0127)) { f_data = 0.0004*((float)speesy_tone_inter + 1.0); if ((((float)matrix[speesy_tone_i][0] + (float)f_data) >= (float)matrix[speesy_tone_x][speesy_tone_y])& (((float)matrix[speesy_tone_i][0] - (float)f_data) <= (float)matrix[speesy_tone_x][speesy_tone_y])) { n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] = n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] + 1; //printf("\ncoincidence 0.0063 - 0.0127"); } } else if ((matrix[speesy_tone_i][0] > 0.0127)&(matrix[speesy_tone_i][0] <= 0.0255)) { f_data = 0.0008*((float)speesy_tone_inter + 1.0); if (((matrix[speesy_tone_i][0] + f_data) >= matrix[speesy_tone_x][speesy_tone_y])& ((matrix[speesy_tone_i][0] - f_data) <= matrix[speesy_tone_x][speesy_tone_y])) { n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] = n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] + 1; //printf("\ncoincidence 0.0127 - 0.0255"); } } else { //printf("\nNO coincidence"); } //printf("\ncoincidence %d",n_coincidence_matrix[speesy_tone_i][speesy_tone_inter]); } //end for } //end for for (speesy_tone_inter = 0; speesy_tone_inter<4;speesy_tone_inter++) { for (speesy_tone_i = 0;speesy_tone_i<6;speesy_tone_i++) { //printf("\nDo mat_ton %d",(int)n_coincidence_matrix[speesy_tone_i][speesy_tone_inter]); } } if (speesy_tone_inter == 0) { for (speesy_tone_i = 0;speesy_tone_i<6;speesy_tone_i++) { if (n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] >= 1) { n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] -= 1; } else { n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] = 0; } } } else if (speesy_tone_inter == 1) { for (speesy_tone_i = 0;speesy_tone_i<6;speesy_tone_i++) { if (n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] >= 2) { n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] -= 2; } else { n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] = 0; } } } else if (speesy_tone_inter == 2) { for (speesy_tone_i = 0;speesy_tone_i<6;speesy_tone_i++) { if (n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] >= 5) { n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] -= 5; } else { n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] = 0; } } } else if (speesy_tone_inter == 3) { for (speesy_tone_i = 0;speesy_tone_i<6;speesy_tone_i++) { if (n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] >= 7) { n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] -= 7; } else { n_coincidence_matrix[speesy_tone_i][speesy_tone_inter] = 0; } } } } //end for } //end for () for inter out_t = 0; speesy_tone_x = 0; for (speesy_tone_inter = 0; speesy_tone_inter<4;speesy_tone_inter++) { for (speesy_tone_i = 0;speesy_tone_i<6;speesy_tone_i++) { //printf("\n mat_ton %d",(int)n_coincidence_matrix[speesy_tone_i][speesy_tone_inter]); if (speesy_tone_x < n_coincidence_matrix[speesy_tone_i][speesy_tone_inter]) { speesy_tone_x = n_coincidence_matrix[speesy_tone_i][speesy_tone_inter]; out_t = matrix[speesy_tone_i][0]; } } } speesy_all_coincidence = speesy_tone_x; } // end if detector_t_end = detector_t_end + p_conts; if (detector_t_end > 0.01) detector_t_end = 0; return out_t; } float speesy_GetAllCoincidence(void) { return speesy_all_coincidence; } float speesy_GetBasicToneEntropy(void) { return speesy_fliter600_Entropy; } void speesy_SetFreqMeander(float freq) { if (freq > 0) { speesy_meander_period = (1.0/freq)/2; } } signed char speesy_Meander(void) { static float tim = 0; static signed char out = SPEESY_MEANDER_MAX; if (tim < speesy_meander_period) { tim = tim + 0.0000625; } else { tim = 0; out = -out; } return out; }
また、バンドパスフィルターの櫛のコード。
#define SPEESY_NCOEF 4 #define SPEESY_MAXCAN 16 #define SPEESY_SAMPLE_FREQ8 8000 #define SPEESY_SAMPLE_FREQ16 16000 #define SPEESY_SAMPLE_FREQ SPEESY_SAMPLE_FREQ16 #if SPEESY_SAMPLE_FREQ == SPEESY_SAMPLE_FREQ16 //const float speesy_gain_correction_factor[16] = {1}; //for 0-88 Hz const float ACoef1[SPEESY_NCOEF+1] = { 0.00000010368236408362, 0.00000041472945633450, 0.00000062209418450175, 0.00000041472945633450, 0.00000010368236408362 }; const float BCoef1[SPEESY_NCOEF] = { -3.89262720221970990000, 5.68304206565440850000, -3.68807460061232460000, 0.89766108913372833000 }; //for 88-188 Hz --- const float ACoef2[SPEESY_NCOEF+1] = { 0.00046664702180067459, 0.00000000000000000000, -0.00093329404360134919, 0.00000000000000000000, 0.00046664702180067459 }; const float BCoef2[SPEESY_NCOEF] = { -3.92772838537582160000, 5.78986681239677910000, -3.79636811635581890000, 0.93423598091247251000 }; //for 188-300 Hz const float ACoef3[SPEESY_NCOEF+1] = { 0.00068858979234044106, 0.00000000000000000000, -0.00137717958468088210, 0.00000000000000000000, 0.00068858979234044106 }; const float BCoef3[SPEESY_NCOEF] = { -3.90771680345434060000, 5.74278248379999570000, -3.76163133600848760000, 0.92663841158343707000 }; //for 300-426 Hz const float ACoef4[SPEESY_NCOEF+1] = { 0.00088886359477686550, 0.00000000000000000000, -0.00177772718955373100, 0.00000000000000000000, 0.00088886359477686550 }; const float BCoef4[SPEESY_NCOEF] = { -3.87697578244056950000, 5.67379106513293690000, -3.71429576416733910000, 0.91785164973031175000 }; //for 426-569 Hz const float ACoef5[SPEESY_NCOEF+1] = { 0.00089752885269638212, 0.00000000000000000000, -0.00179505770539276420, 0.00000000000000000000, 0.00089752885269638212 }; const float BCoef5[SPEESY_NCOEF] = { -3.83152224876138180000, 5.57511629406004070000, -3.64956251837243120000, 0.90729235654450602000 }; //for 569-729 Hz const float ACoef6[SPEESY_NCOEF+1] = { 0.00117165116363920890, 0.00000000000000000000, -0.00234330232727841770, 0.00000000000000000000, 0.00117165116363920890 }; const float BCoef6[SPEESY_NCOEF] = { -3.76921491262598970000, 5.44568593950509160000, -3.56948525439078870000, 0.89685259841470821000 }; //for 729-910 Hz const float ACoef7[SPEESY_NCOEF+1] = { 0.00148423763165421900, 0.00000000000000000000, -0.00296847526330843790, 0.00000000000000000000, 0.00148423763165421900 }; const float BCoef7[SPEESY_NCOEF] = { -3.68252961240084180000, 5.27062615397503010000, -3.46252708324253880000, 0.88411914122102575000 }; //for 910-1113 Hz const float ACoef8[SPEESY_NCOEF+1] = { 0.00200280660037213200, 0.00000000000000000000, -0.00400561320074426400, 0.00000000000000000000, 0.00200280660037213200 }; const float BCoef8[SPEESY_NCOEF] = { -3.56693687706466770000, 5.04696879760847760000, -3.32877844509510410000, 0.87096927786413736000 }; //for 1113-1343 Hz const float ACoef9[SPEESY_NCOEF+1] = { 0.00211587349387137120, 0.00000000000000000000, -0.00423174698774274240, 0.00000000000000000000, 0.00211587349387137120 }; const float BCoef9[SPEESY_NCOEF] = { -3.41224013209053600000, 4.75975212198515950000, -3.15521200191456290000, 0.85509175287783645000 }; //for 1343-1601 Hz const float ACoef10[SPEESY_NCOEF+1] = { 0.00297423038464923910, 0.00000000000000000000, -0.00594846076929847830, 0.00000000000000000000, 0.00297423038464923910 }; const float BCoef10[SPEESY_NCOEF] = { -3.21142823810671900000, 4.40933217825630660000, -2.94127038526055400000, 0.83892403143238325000 }; //for 1601-1892 Hz const float ACoef11[SPEESY_NCOEF+1] = { 0.00355749937553949790, 0.00000000000000000000, -0.00711499875107899590, 0.00000000000000000000, 0.00355749937553949790 }; const float BCoef11[SPEESY_NCOEF] = { -2.95205117909921370000, 3.98864705820180850000, -2.67338596187190400000, 0.82024999905406459000 }; //for 1892-2219 Hz const float ACoef12[SPEESY_NCOEF+1] = { 0.00647978043392210490, 0.00000000000000000000, -0.01295956086784421000, 0.00000000000000000000, 0.00647978043392210490 }; const float BCoef12[SPEESY_NCOEF] = { -2.62319693441575370000, 3.50739946700623410000, -2.34648117429591170000, 0.80033689362210914000 }; //for 2219-2588 Hz const float ACoef13[SPEESY_NCOEF+1] = { 0.00856598928083165260, 0.00000000000000000000, -0.01713197856166330500, 0.00000000000000000000, 0.00856598928083165260 }; const float BCoef13[SPEESY_NCOEF] = { -2.21114034361129000000, 2.98277240977037210000, -1.94961151450908200000, 0.77769319296960093000 }; //for 2588-3004 Hz const float ACoef14[SPEESY_NCOEF+1] = { 0.02526264992554181800, 0.00000000000000000000, -0.05052529985108363700, 0.00000000000000000000, 0.02526264992554181800 }; const float BCoef14[SPEESY_NCOEF] = { -1.70416700060032110000, 2.45684840140417120000, -1.47852699918255030000, 0.75308204601400430000 }; //for 3004-3472 Hz const float ACoef15[SPEESY_NCOEF+1] = { 0.03942139343875778600, 0.00000000000000000000, -0.07884278687751557200, 0.00000000000000000000, 0.03942139343875778600 }; const float BCoef15[SPEESY_NCOEF] = { -1.09464887950984990000, 1.99774885820253490000, -0.93284437413716226000, 0.72671843772403244000 }; //for 3472-4000 Hz const float ACoef16[SPEESY_NCOEF+1] = { 0.11014553344131538000, 0.00000000000000000000, -0.22029106688263075000, 0.00000000000000000000, 0.11014553344131538000 }; const float BCoef16[SPEESY_NCOEF] = { -0.38091397871674004000, 1.69738617536193790000, -0.31794271360590415000, 0.69738617534660274000 }; #endif // SPEESY_SAMPLE_FREQ static float speesy_y1[SPEESY_NCOEF+1]; static float speesy_x1[SPEESY_NCOEF+1]; static float speesy_y2[SPEESY_NCOEF+1]; static float speesy_x2[SPEESY_NCOEF+1]; static float speesy_y3[SPEESY_NCOEF+1]; static float speesy_x3[SPEESY_NCOEF+1]; static float speesy_y4[SPEESY_NCOEF+1]; static float speesy_x4[SPEESY_NCOEF+1]; static float speesy_y5[SPEESY_NCOEF+1]; static float speesy_x5[SPEESY_NCOEF+1]; static float speesy_y6[SPEESY_NCOEF+1]; static float speesy_x6[SPEESY_NCOEF+1]; static float speesy_y7[SPEESY_NCOEF+1]; static float speesy_x7[SPEESY_NCOEF+1]; static float speesy_y8[SPEESY_NCOEF+1]; static float speesy_x8[SPEESY_NCOEF+1]; static float speesy_y9[SPEESY_NCOEF+1]; static float speesy_x9[SPEESY_NCOEF+1]; static float speesy_y10[SPEESY_NCOEF+1]; static float speesy_x10[SPEESY_NCOEF+1]; static float speesy_y11[SPEESY_NCOEF+1]; static float speesy_x11[SPEESY_NCOEF+1]; static float speesy_y12[SPEESY_NCOEF+1]; static float speesy_x12[SPEESY_NCOEF+1]; static float speesy_y13[SPEESY_NCOEF+1]; static float speesy_x13[SPEESY_NCOEF+1]; static float speesy_y14[SPEESY_NCOEF+1]; static float speesy_x14[SPEESY_NCOEF+1]; static float speesy_y15[SPEESY_NCOEF+1]; static float speesy_x15[SPEESY_NCOEF+1]; static float speesy_y16[SPEESY_NCOEF+1]; static float speesy_x16[SPEESY_NCOEF+1]; static float speesy_cannel[SPEESY_MAXCAN] ={0}; static float speesy_value[SPEESY_MAXCAN] ={0}; static int speesy_i = 0; const float speesy_gain_correction_factor[16] = {0.95,0.79,0.66,0.66,0.8,0.79,0.8,0.74,0.85,0.79,0.834,0.57,0.54,0.23,0.18,0.082}; void speesy_set_cannel(float * cannel) { for (speesy_i = 0; speesy_i < SPEESY_MAXCAN; speesy_i++) { speesy_value[speesy_i] = cannel[speesy_i]; } } void speesy_get_value(float * value) { for (speesy_i = 0; speesy_i < SPEESY_MAXCAN; speesy_i++) { value[speesy_i] = speesy_cannel[speesy_i] * speesy_gain_correction_factor[speesy_i]; } } void speesy_update_filter(float NewSample) { /*************1***********/ speesy_x1[4] = speesy_x1[3]; speesy_y1[4] = speesy_y1[3]; speesy_x1[3] = speesy_x1[2]; speesy_y1[3] = speesy_y1[2]; speesy_x1[2] = speesy_x1[1]; speesy_y1[2] = speesy_y1[1]; speesy_x1[1] = speesy_x1[0]; speesy_y1[1] = speesy_y1[0]; speesy_x1[0] = speesy_value[0]*NewSample; speesy_y1[0] = ACoef1[0] * speesy_x1[0]; speesy_y1[0] += ACoef1[1] * speesy_x1[1] - BCoef1[0] * speesy_y1[1]; speesy_y1[0] += ACoef1[2] * speesy_x1[2] - BCoef1[1] * speesy_y1[2]; speesy_y1[0] += ACoef1[3] * speesy_x1[3] - BCoef1[2] * speesy_y1[3]; speesy_y1[0] += ACoef1[4] * speesy_x1[4] - BCoef1[3] * speesy_y1[4]; speesy_cannel[0] = speesy_y1[0]; /*************************/ /*************2***********/ speesy_x2[4] = speesy_x2[3]; speesy_y2[4] = speesy_y2[3]; speesy_x2[3] = speesy_x2[2]; speesy_y2[3] = speesy_y2[2]; speesy_x2[2] = speesy_x2[1]; speesy_y2[2] = speesy_y2[1]; speesy_x2[1] = speesy_x2[0]; speesy_y2[1] = speesy_y2[0]; speesy_x2[0] = speesy_value[1]*NewSample; speesy_y2[0] = ACoef2[0] * speesy_x2[0]; speesy_y2[0] += ACoef2[1] * speesy_x2[1] - BCoef2[0] * speesy_y2[1]; speesy_y2[0] += ACoef2[2] * speesy_x2[2] - BCoef2[1] * speesy_y2[2]; speesy_y2[0] += ACoef2[3] * speesy_x2[3] - BCoef2[2] * speesy_y2[3]; speesy_y2[0] += ACoef2[4] * speesy_x2[4] - BCoef2[3] * speesy_y2[4]; speesy_cannel[1] = speesy_y2[0]; /*************************/ /*************3***********/ speesy_x3[4] = speesy_x3[3]; speesy_y3[4] = speesy_y3[3]; speesy_x3[3] = speesy_x3[2]; speesy_y3[3] = speesy_y3[2]; speesy_x3[2] = speesy_x3[1]; speesy_y3[2] = speesy_y3[1]; speesy_x3[1] = speesy_x3[0]; speesy_y3[1] = speesy_y3[0]; speesy_x3[0] = speesy_value[2]*NewSample; speesy_y3[0] = ACoef3[0] * speesy_x3[0]; speesy_y3[0] += ACoef3[1] * speesy_x3[1] - BCoef3[0] * speesy_y3[1]; speesy_y3[0] += ACoef3[2] * speesy_x3[2] - BCoef3[1] * speesy_y3[2]; speesy_y3[0] += ACoef3[3] * speesy_x3[3] - BCoef3[2] * speesy_y3[3]; speesy_y3[0] += ACoef3[4] * speesy_x3[4] - BCoef3[3] * speesy_y3[4]; speesy_cannel[2] = speesy_y3[0]; /*************************/ /*************4***********/ speesy_x4[4] = speesy_x4[3]; speesy_y4[4] = speesy_y4[3]; speesy_x4[3] = speesy_x4[2]; speesy_y4[3] = speesy_y4[2]; speesy_x4[2] = speesy_x4[1]; speesy_y4[2] = speesy_y4[1]; speesy_x4[1] = speesy_x4[0]; speesy_y4[1] = speesy_y4[0]; speesy_x4[0] = speesy_value[3]*NewSample; speesy_y4[0] = ACoef4[0] * speesy_x4[0]; speesy_y4[0] += ACoef4[1] * speesy_x4[1] - BCoef4[0] * speesy_y4[1]; speesy_y4[0] += ACoef4[2] * speesy_x4[2] - BCoef4[1] * speesy_y4[2]; speesy_y4[0] += ACoef4[3] * speesy_x4[3] - BCoef4[2] * speesy_y4[3]; speesy_y4[0] += ACoef4[4] * speesy_x4[4] - BCoef4[3] * speesy_y4[4]; speesy_cannel[3] = speesy_y4[0]; /*************************/ /*************5***********/ speesy_x5[4] = speesy_x5[3]; speesy_y5[4] = speesy_y5[3]; speesy_x5[3] = speesy_x5[2]; speesy_y5[3] = speesy_y5[2]; speesy_x5[2] = speesy_x5[1]; speesy_y5[2] = speesy_y5[1]; speesy_x5[1] = speesy_x5[0]; speesy_y5[1] = speesy_y5[0]; speesy_x5[0] = speesy_value[4]*NewSample; speesy_y5[0] = ACoef5[0] * speesy_x5[0]; speesy_y5[0] += ACoef5[1] * speesy_x5[1] - BCoef5[0] * speesy_y5[1]; speesy_y5[0] += ACoef5[2] * speesy_x5[2] - BCoef5[1] * speesy_y5[2]; speesy_y5[0] += ACoef5[3] * speesy_x5[3] - BCoef5[2] * speesy_y5[3]; speesy_y5[0] += ACoef5[4] * speesy_x5[4] - BCoef5[3] * speesy_y5[4]; speesy_cannel[4] = speesy_y5[0]; /*************************/ /*************6***********/ speesy_x6[4] = speesy_x6[3]; speesy_y6[4] = speesy_y6[3]; speesy_x6[3] = speesy_x6[2]; speesy_y6[3] = speesy_y6[2]; speesy_x6[2] = speesy_x6[1]; speesy_y6[2] = speesy_y6[1]; speesy_x6[1] = speesy_x6[0]; speesy_y6[1] = speesy_y6[0]; speesy_x6[0] = speesy_value[5]*NewSample; speesy_y6[0] = ACoef6[0] * speesy_x6[0]; speesy_y6[0] += ACoef6[1] * speesy_x6[1] - BCoef6[0] * speesy_y6[1]; speesy_y6[0] += ACoef6[2] * speesy_x6[2] - BCoef6[1] * speesy_y6[2]; speesy_y6[0] += ACoef6[3] * speesy_x6[3] - BCoef6[2] * speesy_y6[3]; speesy_y6[0] += ACoef6[4] * speesy_x6[4] - BCoef6[3] * speesy_y6[4]; speesy_cannel[5] = speesy_y6[0]; /*************************/ /*************7***********/ speesy_x7[4] = speesy_x7[3]; speesy_y7[4] = speesy_y7[3]; speesy_x7[3] = speesy_x7[2]; speesy_y7[3] = speesy_y7[2]; speesy_x7[2] = speesy_x7[1]; speesy_y7[2] = speesy_y7[1]; speesy_x7[1] = speesy_x7[0]; speesy_y7[1] = speesy_y7[0]; speesy_x7[0] = speesy_value[6]*NewSample; speesy_y7[0] = ACoef7[0] * speesy_x7[0]; speesy_y7[0] += ACoef7[1] * speesy_x7[1] - BCoef7[0] * speesy_y7[1]; speesy_y7[0] += ACoef7[2] * speesy_x7[2] - BCoef7[1] * speesy_y7[2]; speesy_y7[0] += ACoef7[3] * speesy_x7[3] - BCoef7[2] * speesy_y7[3]; speesy_y7[0] += ACoef7[4] * speesy_x7[4] - BCoef7[3] * speesy_y7[4]; speesy_cannel[6] = speesy_y7[0]; /*************************/ /*************8***********/ speesy_x8[4] = speesy_x8[3]; speesy_y8[4] = speesy_y8[3]; speesy_x8[3] = speesy_x8[2]; speesy_y8[3] = speesy_y8[2]; speesy_x8[2] = speesy_x8[1]; speesy_y8[2] = speesy_y8[1]; speesy_x8[1] = speesy_x8[0]; speesy_y8[1] = speesy_y8[0]; speesy_x8[0] = speesy_value[7]*NewSample; speesy_y8[0] = ACoef8[0] * speesy_x8[0]; speesy_y8[0] += ACoef8[1] * speesy_x8[1] - BCoef8[0] * speesy_y8[1]; speesy_y8[0] += ACoef8[2] * speesy_x8[2] - BCoef8[1] * speesy_y8[2]; speesy_y8[0] += ACoef8[3] * speesy_x8[3] - BCoef8[2] * speesy_y8[3]; speesy_y8[0] += ACoef8[4] * speesy_x8[4] - BCoef8[3] * speesy_y8[4]; speesy_cannel[7] = speesy_y8[0]; /*************************/ /*************9***********/ speesy_x9[4] = speesy_x9[3]; speesy_y9[4] = speesy_y9[3]; speesy_x9[3] = speesy_x9[2]; speesy_y9[3] = speesy_y9[2]; speesy_x9[2] = speesy_x9[1]; speesy_y9[2] = speesy_y9[1]; speesy_x9[1] = speesy_x9[0]; speesy_y9[1] = speesy_y9[0]; speesy_x9[0] = speesy_value[8]*NewSample; speesy_y9[0] = ACoef9[0] * speesy_x9[0]; speesy_y9[0] += ACoef9[1] * speesy_x9[1] - BCoef9[0] * speesy_y9[1]; speesy_y9[0] += ACoef9[2] * speesy_x9[2] - BCoef9[1] * speesy_y9[2]; speesy_y9[0] += ACoef9[3] * speesy_x9[3] - BCoef9[2] * speesy_y9[3]; speesy_y9[0] += ACoef9[4] * speesy_x9[4] - BCoef9[3] * speesy_y9[4]; speesy_cannel[8] = speesy_y9[0]; /*************************/ /*************10***********/ speesy_x10[4] = speesy_x10[3]; speesy_y10[4] = speesy_y10[3]; speesy_x10[3] = speesy_x10[2]; speesy_y10[3] = speesy_y10[2]; speesy_x10[2] = speesy_x10[1]; speesy_y10[2] = speesy_y10[1]; speesy_x10[1] = speesy_x10[0]; speesy_y10[1] = speesy_y10[0]; speesy_x10[0] = speesy_value[9]*NewSample; speesy_y10[0] = ACoef10[0] * speesy_x10[0]; speesy_y10[0] += ACoef10[1] * speesy_x10[1] - BCoef10[0] * speesy_y10[1]; speesy_y10[0] += ACoef10[2] * speesy_x10[2] - BCoef10[1] * speesy_y10[2]; speesy_y10[0] += ACoef10[3] * speesy_x10[3] - BCoef10[2] * speesy_y10[3]; speesy_y10[0] += ACoef10[4] * speesy_x10[4] - BCoef10[3] * speesy_y10[4]; speesy_cannel[9] = speesy_y10[0]; /*************************/ /*************11***********/ speesy_x11[4] = speesy_x11[3]; speesy_y11[4] = speesy_y11[3]; speesy_x11[3] = speesy_x11[2]; speesy_y11[3] = speesy_y11[2]; speesy_x11[2] = speesy_x11[1]; speesy_y11[2] = speesy_y11[1]; speesy_x11[1] = speesy_x11[0]; speesy_y11[1] = speesy_y11[0]; speesy_x11[0] = speesy_value[10]*NewSample; speesy_y11[0] = ACoef11[0] * speesy_x11[0]; speesy_y11[0] += ACoef11[1] * speesy_x11[1] - BCoef11[0] * speesy_y11[1]; speesy_y11[0] += ACoef11[2] * speesy_x11[2] - BCoef11[1] * speesy_y11[2]; speesy_y11[0] += ACoef11[3] * speesy_x11[3] - BCoef11[2] * speesy_y11[3]; speesy_y11[0] += ACoef11[4] * speesy_x11[4] - BCoef11[3] * speesy_y11[4]; speesy_cannel[10] = speesy_y11[0]; /*************************/ /*************12***********/ speesy_x12[4] = speesy_x12[3]; speesy_y12[4] = speesy_y12[3]; speesy_x12[3] = speesy_x12[2]; speesy_y12[3] = speesy_y12[2]; speesy_x12[2] = speesy_x12[1]; speesy_y12[2] = speesy_y12[1]; speesy_x12[1] = speesy_x12[0]; speesy_y12[1] = speesy_y12[0]; speesy_x12[0] = speesy_value[11]*NewSample; speesy_y12[0] = ACoef12[0] * speesy_x12[0]; speesy_y12[0] += ACoef12[1] * speesy_x12[1] - BCoef12[0] * speesy_y12[1]; speesy_y12[0] += ACoef12[2] * speesy_x12[2] - BCoef12[1] * speesy_y12[2]; speesy_y12[0] += ACoef12[3] * speesy_x12[3] - BCoef12[2] * speesy_y12[3]; speesy_y12[0] += ACoef12[4] * speesy_x12[4] - BCoef12[3] * speesy_y12[4]; speesy_cannel[11] = speesy_y12[0]; /*************************/ /*************13***********/ speesy_x13[4] = speesy_x13[3]; speesy_y13[4] = speesy_y13[3]; speesy_x13[3] = speesy_x13[2]; speesy_y13[3] = speesy_y13[2]; speesy_x13[2] = speesy_x13[1]; speesy_y13[2] = speesy_y13[1]; speesy_x13[1] = speesy_x13[0]; speesy_y13[1] = speesy_y13[0]; speesy_x13[0] = speesy_value[12]*NewSample; speesy_y13[0] = ACoef13[0] * speesy_x13[0]; speesy_y13[0] += ACoef13[1] * speesy_x13[1] - BCoef13[0] * speesy_y13[1]; speesy_y13[0] += ACoef13[2] * speesy_x13[2] - BCoef13[1] * speesy_y13[2]; speesy_y13[0] += ACoef13[3] * speesy_x13[3] - BCoef13[2] * speesy_y13[3]; speesy_y13[0] += ACoef13[4] * speesy_x13[4] - BCoef13[3] * speesy_y13[4]; speesy_cannel[12] = speesy_y13[0]; /*************************/ /*************14***********/ speesy_x14[4] = speesy_x14[3]; speesy_y14[4] = speesy_y14[3]; speesy_x14[3] = speesy_x14[2]; speesy_y14[3] = speesy_y14[2]; speesy_x14[2] = speesy_x14[1]; speesy_y14[2] = speesy_y14[1]; speesy_x14[1] = speesy_x14[0]; speesy_y14[1] = speesy_y14[0]; speesy_x14[0] = speesy_value[13]*NewSample; speesy_y14[0] = ACoef14[0] * speesy_x14[0]; speesy_y14[0] += ACoef14[1] * speesy_x14[1] - BCoef14[0] * speesy_y14[1]; speesy_y14[0] += ACoef14[2] * speesy_x14[2] - BCoef14[1] * speesy_y14[2]; speesy_y14[0] += ACoef14[3] * speesy_x14[3] - BCoef14[2] * speesy_y14[3]; speesy_y14[0] += ACoef14[4] * speesy_x14[4] - BCoef14[3] * speesy_y14[4]; speesy_cannel[13] = speesy_y14[0]; /*************************/ /*************15***********/ speesy_x15[4] = speesy_x15[3]; speesy_y15[4] = speesy_y15[3]; speesy_x15[3] = speesy_x15[2]; speesy_y15[3] = speesy_y15[2]; speesy_x15[2] = speesy_x15[1]; speesy_y15[2] = speesy_y15[1]; speesy_x15[1] = speesy_x15[0]; speesy_y15[1] = speesy_y15[0]; speesy_x15[0] = speesy_value[14]*NewSample; speesy_y15[0] = ACoef15[0] * speesy_x15[0]; speesy_y15[0] += ACoef15[1] * speesy_x15[1] - BCoef15[0] * speesy_y15[1]; speesy_y15[0] += ACoef15[2] * speesy_x15[2] - BCoef15[1] * speesy_y15[2]; speesy_y15[0] += ACoef15[3] * speesy_x15[3] - BCoef15[2] * speesy_y15[3]; speesy_y15[0] += ACoef15[4] * speesy_x15[4] - BCoef15[3] * speesy_y15[4]; speesy_cannel[14] = speesy_y15[0]; /*************************/ /*************16***********/ speesy_x16[4] = speesy_x16[3]; speesy_y16[4] = speesy_y16[3]; speesy_x16[3] = speesy_x16[2]; speesy_y16[3] = speesy_y16[2]; speesy_x16[2] = speesy_x16[1]; speesy_y16[2] = speesy_y16[1]; speesy_x16[1] = speesy_x16[0]; speesy_y16[1] = speesy_y16[0]; speesy_x16[0] = speesy_value[15]*NewSample; speesy_y16[0] = ACoef16[0] * speesy_x16[0]; speesy_y16[0] += ACoef16[1] * speesy_x16[1] - BCoef16[0] * speesy_y16[1]; speesy_y16[0] += ACoef16[2] * speesy_x16[2] - BCoef16[1] * speesy_y16[2]; speesy_y16[0] += ACoef16[3] * speesy_x16[3] - BCoef16[2] * speesy_y16[3]; speesy_y16[0] += ACoef16[4] * speesy_x16[4] - BCoef16[3] * speesy_y16[4]; speesy_cannel[15] = speesy_y16[0]; /*************************/ }
PS Speechシンセサイザーは、Speesyと呼ばれます（スピーチとシンセサイザーという言葉から）。