Example: TrebleBoost_wComp_wEarpieces_wApp no output to shield

[eyuan-creare]

In TrebleBoost_wComp_wEarpieces_wApp, I can hear sound from the earpiece mic to headphones on the Tympan. However, when I move my headphones to the Earpiece shield headphone jack, I can't hear sound.

I noticed that the quad version of the audio input and output was not used. I tried changing it to the quad version, but no luck.

existing patchcord

AudioInputI2S_F32           i2s_in(audio_settings);     //Digital audio in *from* the Teensy Audio Board ADC.
...
AudioOutputI2S_F32          i2s_out(audio_settings);    //Digital audio out *to* the Teensy Audio Board DAC.

I also tried reverting the patchcord to a simple passthru. Also no luck.

AudioConnection_F32         patchcord1(i2s_in,0,earpieceMixer,0);
AudioConnection_F32         patchcord2(i2s_in,1,earpieceMixer,1);
AudioConnection_F32         patchcord3(i2s_in,2,earpieceMixer,2);
AudioConnection_F32         patchcord4(i2s_in,3,earpieceMixer,3);

However, the AudioPassthru_wEarpieces does work (earpiece mic sends sound to earpiece shield headphone jack and RIC).

[eyuan-creare]

Same symptom with the EarpieceManualMixing_wSD. Sound on the Tympan Headphone jack but not the shield.

Also, the trebleboost example seems to be missing this. Though perhaps it is now called behind the scenes.

   myTympan.enableDigitalMicInputs(true);
   earpieceShield.enableDigitalMicInputs(true);

[chipaudette]

Tested on a RevE using Tympan_Library release_candidate1.

• Confirmed that AudioPassthru_wEarpieces does work
• Confirmed that TrebleBoost_wComp_wEarpieces_wApp doesn't work (ie, is silent)

I looked at the question of whether enableDigitalMicInputs was being called. When using the EarpieceMixer_F32 class, you use the class's methods to choose between the different inputs. It does indeed call enableDigitalMicInputs. Here's the trail:

1) In TrebleBoost_wComp_wEarpieces_wApp in setup():

• It calls earpieceMixer.setInputAnalogVsPDM(EarpieceMixerState::INPUT_PDM); 2) In EarpieceMixer_F32, we find setInputAnalogVsPDM:
• It calls myTympan->enableDigitalMicInputs(true) and earpieceShield->enableDigitalMicInputs(true);

So, I think that this is not our problem. Bummer. That would have been an easy fix. I'm still on this...

[chipaudette]

The issue was that it was not using the quad versions of the I2S inptu and output...ie, it needed AudioInputI2SQuad_F32 and AudioOutputI2SQuad_F32. I think that you maybe flagged this somewhere else.

I also made small memory changes to the audio flow in the EarpieceMixer_F32 class, but I don't think that it had an effect.

Stupid mistake on my part. How did this not get picked up in testing? I don't know...

I pushed the changes for EarpieceMixer_F32 and for TrebleBoost_wComp_wEarpieces_wApp to the Tympan_Library, the release_candidate1 branch: cc5cb17

[chipaudette]

@eyuan-creare ,

You said that EarpieceManualMixing_wSD wasn't working for you?

I just tried EarpieceManualMixing_wSD, with an earpiece plugged in. I successfully heard audio from both the Tympan headphone jack and from the Shield's headphone jack. It worked.

Since this sketch doesn't use the EarpieceMixer, I don't see how my changes could have had any influence. Perhaps the other code updates that are in the release_candidate1 branch solved the problem?

[I also confirmed that AudioPassThru_wEarpieces still works. Both headphone jacks.]

[eyuan-creare]

Closing this out as I tried this with the updated library and I can now hear sound from the earpiece mics to the AIC shield headphone output.