Whoa, that’s exciting this might be fixed at the ALSA level, thanks for the good news. It’s clear it can be addressed at a variety of levels such as JRiver’s “Play silence at startup for hardware synchronization”. I’ve often seen the blame placed on DAC designs that don’t mute the first 50ms of native output. Keep hoping iFi will address it in a firmware update. According to that link the patch was accepted so I’ll be watching keenly for alsa 1.1.4 to come downstream. Until then I’ll stick to DoP.
I seem to recall something like this when skipping manually to other parts of a track or to the next track but continuous play seems to be no issue. I forget if this was on the RPi or if it was also happening on my Win10 core connected DSD ready DAC’s … might go and retry that and report back
This indeed a good news, I’ve an Auralic Aries Mini and tried on the Holo Spring, I got loud pop at the start of DSD256 track. It only happens at DSD256 native mode, and not DSD64/128. The later ones are transported via DoP. I’ve contacted Auralic and Jeff Zhu sometimes ago and they are looking into it.
I don’t know if this patch should be applied at the source or the DAC end or both, but this indeed in a right step direction!
This nasty loud pop only happens in Linux OS and must be transported via native mode, not DoP. Windows+Roon with Holo Spring driver don’t experience any nasty loud pop at all. I’ve tried all the way to DSD256 native mode.
Be mindful these nasty loud pop can potentially damage your amps and speakers if the volume is set too high!
Sure thing. I’m using an iFi iDAC2, and applied the patch to the 4.9 kernel on Arch Linux, running roonserver. Simple one box setup, although I’m now experimenting with a home-brewed NAA, fun stuff
Before this, any native non-DoP DSD playback would commence with that startlingly loud pop sound. Depending on the playlist behaviour of a given player, sometimes it would be just the one pop. JRiver’s leading silence was an effective kludge, and HQPlayer standalone is less prone I think because it takes control of the audio system and never lets go.
I noticed the 4.10 kernel was released today and it has these changes merged. For stability’s sake I’ve since switched my roonserver PC to Debian Stretch, which is on 4.9. The pop is back, but now I know how to fix it. I think they mean to include 4.10 in the Stretch release but coming from Arch I’m not sure I can wait more than a day or two. I’ll report back after I figure out the correct procedures for patching here.
Pre patch (DietPi v143) a loud ‘pop’ best described as the equivalent to dropping the stylus onto an LP at the beginning of play with volume set moderately high.Only occurs when starting Roon playback from a new playlist/album/track. If the playback queue is kept populated and playback never actually stops or is paused then the noise is not heard.
I recently tried an Odroid C2 as a drop in replacement for the Raspberry Pi 3 now that Roon Bridge is included in the DietPi build for this SBC. The ‘pop’ noise returned, I assume due to the fact that the ARM kernel is way behind that of the RPi release and the ALSA patch was not applied by @Dan_Knight for v144.
I don´t think the patch is already included in the dietPi v144 release. I experienced the same pop noises at the beginning of a new DSD album or when using the track skip function on my McIntosh C2600 preamp with attached Raspi via USB. This happened in native DSD and also in DSD over PCM mode.
After applying the patch to the v144 release the pop noises have gone in both DSD modes.