Been experimenting with ways to clean up audio when USB is connected.
Believe it is likely a ground loop issue however.
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@ -78,6 +78,7 @@ void audioInit()
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audioSelectRxInput(RX_RIG_IN);
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audioSelectTxInput(TX_MIC_IN); // superfluous I think
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//audioCtrl.adcHighPassFilterDisable();
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audioCtrl.audioPreProcessorEnable();
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}
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@ -202,11 +203,15 @@ void audioSelectRxInput(RxInput input)
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case RX_RIG_IN:
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muteRxUSBIn();
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restoreRxRigIn();
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mixRX.gain(2, 0);
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mixRX.gain(3, 0);
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break;
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case RX_USB_IN:
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muteRxRigIn();
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restoreRxUSBIn();
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mixRX.gain(2, 0);
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mixRX.gain(3, 0);
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break;
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}
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}
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@ -219,6 +224,8 @@ void audioSelectTxInput(TxInput input)
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//muteTxMicIn(); // redundant w/ Line-In
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muteTxLineIn();
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muteTxUSBIn();
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mixTX.gain(2, 0);
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mixTX.gain(3, 0);
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/* switch(input) {
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case TX_MIC_IN:
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muteTxUSBIn();
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@ -579,8 +586,8 @@ int hpFilter[5];
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void audioSSBFilter()
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{
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// calcBiquad(FilterType,FrequencyC,dBgain,Q,QuantizationUnit,SampleRate,int*);
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calcBiquad(FILTER_LOPASS, 3100, 0, 0.707, 524288, 44100, lpFilter);
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calcBiquad(FILTER_HIPASS, 300, 0, 0.707, 524288, 44100, hpFilter);
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calcBiquad(FILTER_LOPASS, 3300, 0, 0.707, 524288, 44100, lpFilter);
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calcBiquad(FILTER_HIPASS, 100, 0, 0.707, 524288, 44100, hpFilter);
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audioCtrl.eqFilter(0, lpFilter);
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audioCtrl.eqFilter(1, hpFilter);
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audioCtrl.eqFilter(2, lpFilter);
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@ -592,8 +599,8 @@ void audioSSBFilter()
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void audioCWFilter()
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{
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// calcBiquad(FilterType,FrequencyC,dBgain,Q,QuantizationUnit,SampleRate,int*);
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calcBiquad(FILTER_LOPASS, 700, 0, 0.707, 524288, 44100, lpFilter);
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calcBiquad(FILTER_HIPASS, 300, 0, 0.707, 524288, 44100, hpFilter);
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calcBiquad(FILTER_LOPASS, 1300, 0, 0.707, 524288, 44100, lpFilter);
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calcBiquad(FILTER_HIPASS, 100, 0, 0.707, 524288, 44100, hpFilter);
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audioCtrl.eqFilter(0, lpFilter);
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audioCtrl.eqFilter(1, hpFilter);
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audioCtrl.eqFilter(2, lpFilter);
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@ -602,11 +609,19 @@ void audioCWFilter()
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audioCtrl.eqFilter(5, hpFilter);
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}
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//======================================================================
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// audioDigiFilter()
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// Create a very wide filter for digital modes... wider than the uBITX
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// needs, but just want to make sure we leave the full audio bandwidth
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// open for digimodes, while ensuring we've cut down any extraneous
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// noise outside the normal band.
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//======================================================================
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void audioDigiFilter()
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{
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// calcBiquad(FilterType,FrequencyC,dBgain,Q,QuantizationUnit,SampleRate,int*);
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calcBiquad(FILTER_LOPASS, 3100, 0, 0.707, 524288, 44100, lpFilter);
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calcBiquad(FILTER_HIPASS, 300, 0, 0.707, 524288, 44100, hpFilter);
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calcBiquad(FILTER_LOPASS, 5000, 0, 0.707, 524288, 44100, lpFilter);
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calcBiquad(FILTER_HIPASS, 100, 0, 0.707, 524288, 44100, hpFilter);
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audioCtrl.eqFilter(0, lpFilter);
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audioCtrl.eqFilter(1, hpFilter);
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audioCtrl.eqFilter(2, lpFilter);
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