AMY_Test_Pi_Pico.ino Sample Rate

[phesterman]

I just discovered that the sample rate (AMY_SAMPLE_RATE) is twice the frequency it should be, so each example sounds an octave higher. I don't know if this is the right way to handle it, but changing line 14 to "i2s.begin(AMY_SAMPLE_RATE/2);" fixes it.

Peter

[bwhitman]

This probably is more likely due to the code sending mono data in a stereo channel (so you're sending data twice as fast as you need to.) I haven't tested this example in a while but i wonder if we're not setting stereo/mono in the i2s setup according to what AMY_NCHANS is.

[phesterman]

Yes, that makes sense. My I2S device is a Pimoroni Pico Audio Pack which is stereo-capable.

[bwhitman]

I've fixed this up in the example by explicitly sending two channels (even though AMY is rendering in mono for this example.) So either render AMY in stereo, or do what I do now in the AMY_Test_Pi_Pico and send mono channel twice. It looks like the arduino-pico i2s module only supports stereo.