Nice set-up i did a bit of a google and found this reply on the Mod my pi form
https://forum.modmypi.com/technical-support/allo-boss-raspberry-pi-master-dac-t1369-10.html Best to leave it at 0db I think > ntroduction > ============ > > This directory contains Device Tree overlays. Device Tree makes it > possible > to support many hardware configurations with a single kernel and > without the > need to explicitly load or blacklist kernel modules. Note that this > isn't a > "pure" Device Tree configuration (c.f. MACH_BCM2835) - some on-board > devices > are still configured by the board support code, but the intention is > to > eventually reach that goal. > > On Raspberry Pi, Device Tree usage is controlled from > /boot/config.txt. By > default, the Raspberry Pi kernel boots with device tree enabled. You > can > completely disable DT usage (for now) by adding: > > Code: Select all > device_tree= > > > to your config.txt, which should cause your Pi to revert to the old > way of > doing things after a reboot. > > > > Name: allo-boss-dac-pcm512x-audio > Info: Configures the Allo Boss DAC audio cards. > Load: dtoverlay=allo-boss-dac-pcm512x-audio,<param> > > Code: Select all > Params: 24db_digital_gain Allow gain to be applied via the > PCM512x codec > Digital volume control. Enable with > > "dtoverlay=allo-boss-dac-pcm512x-audio, > 24db_digital_gain" > (The default behaviour is that the > Digital > volume control is limited to a > maximum of > 0dB. ie. it can attenuate but not > provide > gain. For most users, this will be > desired > as it will prevent clipping. By > appending > the 24db_digital_gain parameter, the > Digital > volume control will allow up to 24dB > of > gain. If this parameter is enabled, > it is the > responsibility of the user to ensure > that > the Digital volume control is set to > a value > that does not result in > clipping/distortion!) > slave Force Boss DAC into slave mode, > using Pi a > master for bit clock and frame > clock. Enable > with > "dtoverlay=allo-boss-dac-pcm512x-audio, > slave" > > > > so editing the config.txt file to include the line > > Code: Select all > dtoverlay=allo-boss-dac-pcm512x-audio, 24db_digital_gain > > should allo raspbian to load the correct modules so that it can see the > DAC as a device for you to send sound to. you can check in th ALSA settings ronnie ------------------------------------------------------------------------ Man in a van's Profile: http://forums.slimdevices.com/member.php?userid=43627 View this thread: http://forums.slimdevices.com/showthread.php?t=108647 _______________________________________________ unix mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/unix
