Airplay and hardware volume

[gungfly]

Thanks!

Could it be solved by just rebuild Shairport Sync with output_format = "S24";
I guess I am not that lucky but better ask

Since the Airplay softvolume sits in the Airplay renderer, and if understood the below correct (which may not be the case ) Shairport Sync can be built to output 24bit audio, it could solve the problem depending on what data types where used when doing the volume multiplication before writing to the 24bit output ?


// These are parameters for the "alsa" audio back end.
// For this section to be operative, Shairport Sync must be built with the following configuration flag:
// --with-alsa
alsa =
{
// output_device = "default"; // the name of the alsa output device. Use "alsamixer" or "aplay" to find out the names of devices, mixers, etc.
// mixer_control_name = "PCM"; // the name of the mixer to use to adjust output volume. If not specified, volume in adjusted in software.
// mixer_device = "default"; // the mixer_device default is whatever the output_device is. Normally you wouldn't have to use this.
// can be 44100, 88200, 176400 or 352800, but the device must have the capability.
output_rate = 44100;
// can be "U8", "S8", "S16", "S24", "S24_3LE", "S24_3BE" or "S32", but the device must have the capability. Except where stated using (*LE or *BE), endianness matches that of the processor.
output_format = "S16";