Usb dac issue Snowsky retro nano

Support
1

App version

Beta

Issue description

  1. Audio is very choopy when connecting snowsky retro nano with dac mode set to USB exclusive.

  2. Sample rate stays on 48k on usb device irrespective of what track is being played. (on both dac modes, exclusive or android direct usb)

Device type

Phone

Media provider

All

Steps to reproduce

Open app
Connect the usb device.
Change the usb dac mode to exclusive.
Audio becomes incredibly choopy.

Additional information

Also dac always shows the sample rate of 48k even when usb dac mode on app is set to either exclusive or android direct usb.

I searched existing issues first

on

I understand that logs are mandatory

on

Log upload name / description

snowsky_retro_nano_choppy, snowsky_retro_nano_very_choppy

2

Could you provide:

  • The RETRO NANO firmware version and its current USB/DAC settings.
  • Symfonium’s current audio output debug information with the DAC connected and USB Exclusive active.
  • A comparison using one 44.1 kHz track and one 48 kHz track: is either smooth, and what rate does the DAC display?
  • If available, the same comparison in another player supporting exclusive USB output: does playback work and does the DAC’s displayed rate change?

Please also capture a separate debug log for Android Direct USB, starting before connecting the DAC. The supplied logs show Standard and Exclusive playback, but don’t establish what happens in Android Direct USB.

3

Retro nano is at firmware version 6.7, the issue is both in PC mode and Phone mode.

I tested a little more and found

when symfonium as set to → android direct usb, dac shows 48k when usb dac is connected initially, if i play 44.1k dac shows 48k, if i play 96k dac switch to 96k, but it then stays at 96k for all track (44.1, 48 etc), dac never switches down from the highest sample rate. if I only play 44.1 and 48k the dac is always at 48k (the highest played sample rate) it does not switch to lower sample rate.

Audio does not crackle in android direct usb in any sample rate track, and I can use the app with external dac and play 44.1k track even if dac is at 96k.

log file shared from app- sam_retro_nano_android_direct_usb

===============================================================

when symfonium as set to → usb exclusive,

as soon as i give usb permissin- the dac switches to 96k

The dac stays at 96k irrespective of the sample rate of the track.

44.1k track is choppy, 48k is choppy, 96k track is smooth/normal.

log file shared from app- sam_retro_nano_exclusive_usb

I checked usb mode with Hiby Music app on same device, and the dac works perfectly, dac automatically switched sample rates based on track.

4

Please try version 15.1.0 beta 5

5

Usb exclusive now works perfectly on 15.1.0 beta 5. All sample rates switch perfectly, no audio issues.

==========================

Android direct usb still have issues where it does not switch down sample rate in dac.

It only switches to higher sample rate (48k to 96k), do no switch to lower sample rate automatically (ie 96 to 48k), if I pause and resume then sample rate switches to lower. (only till 48k).

It never goes down to 44.1k. But no audio choppiness issues.

Uploaded log for android direct usb - retro_nano_android_usb_14_sep_2, retro_nano_android_usb_14_sep_3

6

Screenshot_2026-09-15-09-07-39-89_5a95cb7a76adf25e43f1cd66aca96a7a
Screenshot_2026-09-15-09-07-39-89_5a95cb7a76adf25e43f1cd66aca96a7a1080×2344 254 KB

usb exclusive mode (there seems to be some error at bottom)

Screenshot_2026-09-15-21-22-40-60_5a95cb7a76adf25e43f1cd66aca96a7a
Screenshot_2026-09-15-21-22-40-60_5a95cb7a76adf25e43f1cd66aca96a7a1080×2344 142 KB

android direct mode (does not seems to show all info)

7

Outside USB exclusive it’s out of control of the app.