RetroflagGpi Guides

Useful guides for Retroflag Gpi Case

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Stereo Downsample Fix guide

If your Retroflag Gpi is missing some sounds (you only hear sounds destined for the Right speaker of the stereo audio), it may be due to the fact that it’s outputing audio in a stereo format, but only has a mono speaker. This fix will downsample the stereo audio into mono audio.

# convert stereo to mono output

# internal speaker only plays RIGHT channel
# headphone jack plays BOTH channels
# 50% volume per channel to prevent clipping
  slave.pcm "hw:0"
  slave.channels 2
  type route
  ttable {
    # Copy both input channels to output channel 1 (Right).
    0.1 0.5
    1.1 0.5
    # Copy both input channels to output channel 0 (Left).
    0.0 0.5
    1.0 0.5

pcm.!default monocard

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