nvn Posted September 13, 2019 Share Posted September 13, 2019 I have two nano Pi Neo Core boards and one Nano Pi Neo Core 2 Board. On all boards there is a glitch. When I play the audio file at the beginning and at the end, I hear a click. I think it's because of the DAC's on / off switch. Also, at the beginning of playback, the initial sound is lost for about one second. I did echo -1 > /sys/devices/platform/soc/1c22c00.codec/cdc/pmdown_time The initial and final pulses (clicks) disappeared. But there are still small impulses at the beginning and at the end of the playback. There are also small pulses between file playback. For example: aplay file1.wav file2.wav DAPM? How disable it? On Kernel 3.x sound was perfect. Link to comment Share on other sites More sharing options...
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