64014_HDAudio_ADCtoDAC_Demo.spin2 - One Question
masselon
Posts: 51
Hello All there
It is possible to run the 2 methods bellow simultaneously or sequencialy? (ie, mix all four input signals in the Right and Left DAC channal? - I do have played its in alternated way but I would like to play its simultanously):
pub DemoLineIn(delaysize) | left, right
' Optional - set alternative DAC base drive strength (impedance). Default is 124R, equating to ~31ohms- ideal for many headphones
' ak5704.setDAC_BaseImpedance(P_DAC_124R_3V) ' P_DAC_990R_3V, P_DAC_600R_2V, P_DAC_124R_3V, P_DAC_75R_2V
' Start the audio driver
ak5704.start(BASEPIN_ADC, BASEPIN_DAC)
repeat
' Read left and right samples from Line in jack
left, right := ak5704.getSampleFromADC(ak5704.INPUT_LINE)
' Optional, insert audio processing / effect
if delaysize > 0
left, right := addDelay(delaysize, left, right)
' Write the sample to the DAC output queue
ak5704.sendSampleToDAC(left, right)
pub DemoMicIn(delaysize) | left, right
' Start the audio driver
ak5704.start(BASEPIN_ADC, BASEPIN_DAC)
' Optionally set microphone phantom power, and enable the output
' Note: Without enabling the output, the mic input behaves like a second line input channel!
ak5704.setMicSensitivity(128, ak5704.INPUT_MIC, ak5704.CH_LR) ' value of 128 is default with 0dB gain
ak5704.setMicPower(ak5704.MICPWR_1800mV) ' MICPWR_2800mV, MICPWR_2500mV, MICPWR_1800mV, MICPWR_3000mV
ak5704.setMicPowerOnOff(ak5704.CH_LR, ak5704.ON) ' Phantom power can be enabled on either CH_L, CH_R or both channels with CH_LR
repeat
' Read left and right samples from MIC in jack
left, right := ak5704.getSampleFromADC(ak5704.INPUT_MIC)
' Optional, insert audio processing / effect
if delaysize > 0
left, right := addDelay(delaysize, left, right)
' Write the sample to the DAC output queue
ak5704.sendSampleToDAC(left, right)
Comments
Try adding the Microphone read command after the Line read command, and experiment from there.
Like this...
pub DemoLineIn(delaysize) | left, right, left2, right2 ' Optional - set alternative DAC base drive strength (impedance). Default is 124R, equating to ~31ohms- ideal for many headphones ' ak5704.setDAC_BaseImpedance(P_DAC_124R_3V) ' P_DAC_990R_3V, P_DAC_600R_2V, P_DAC_124R_3V, P_DAC_75R_2V ' Start the audio driver ak5704.start(BASEPIN_ADC, BASEPIN_DAC) ' Set mic channel as line input ak5704.setMicPowerOnOff(ak5704.CH_LR, ak5704.OFF) repeat ' Read left and right samples from Line in jack left, right := ak5704.getSampleFromADC(ak5704.INPUT_LINE) ' Read left and right samples from Mic in jack left2, right2 := ak5704.getSampleFromADC(ak5704.INPUT_MIC) ' Optional, insert audio processing / effect if delaysize > 0 left, right := addDelay(delaysize, left, right) ' Write the sample to the DAC output queue ' - Uncomment only one of the following two lines! Either to hear the line output or the mic output ak5704.sendSampleToDAC(left, right) ' ak5704.sendSampleToDAC(left2, right2) ' In the real world, probably want to experiment with mixing the two audio signals/channels together before outputting them!