Roon ARC iOS gap issue between local-streamed and downloaded FLAC Files [Ticket In]

What’s happening?

· I'm having trouble with Roon ARC

What best describes your issue with ARC

· Other

How can we help?

· None of the above

Other options

· Other

Describe the issue

Roon ARC iOS plays a short audible gap between tracks on the same album that are continuous/gapless, when the last track (e.g. track 1) is a FLAC streamed from the local Roon server, and the next track (track 2) is a FLAC downloaded into the ARC app.

This is what I did to verify this problem:

1. Playback via Roon iOS does not produce audible gap between tracks 1 and 2 of the album.

2. Verify FLAC files do not have gaps/extra samples at end/beginning using Audacity.

3. Deleted ARC downloads, killed ARC app, restarted ARC app, played from track 1 through to track 2 -- no gap between tracks.

4. Re-downloaded ARC playlist including track 2, killed ARC app, restarted ARC app, played from track 1 through to track 2 -- audible gap between tracks.

5. Repeated steps 3 and 4 multiple times to make sure the problem was repeatable -- it is repeatable.

Roon ARC iOS app version 1.0 (333). Roon Server version 2.0 (build 1496).

Source files are FLAC 24bit/96kHz, version downloaded to ARC is "CD Quality", ARC is doing sample rate conversion to 44.1kHz, volume levelling set to "auto".

This is with local Roon server playback of FLAC files, but this is an album that has this behaviour, with track 1 streamed and track 2 downloaded, and is available via Qobuz. Track 1 of this album plays continuously/gapless into track 2.

https://www.qobuz.com/us-en/album/recomposed-by-max-richter-vivaldi-the-four-seasons-andre-de-ridder-daniel-hope-konzerthaus-kammerorchester-berlin-max-richter/j2rz6oweuvjkb

Describe your network setup

iPhone, wifi, bluetooth headphones

Hi @Evan,

Thanks for the report. We’ve captured the diagnostics in logs matching the steps you’ve described. We can clarify with development how the audio engine handles this transition and report back once we know more.

Hi @Evan,

Development has a ticket in the pipeline for this issue. We’ll let you know when we expect an improvement to be released into Early Access. Thanks!

Thank you!

Hi @Evan,
I just wanted to give you an update on the status of your case. The devs are still working on a potential fix for this case. But rest assured it has not been forgotten. When there is a release we will let you know!

Thank you!

Hi @Evan ,

There aren’t any additional details needed at this time, so we will go ahead and close the thread for the time being, and if any other questions arise after the developers have made progress on the case, we will re-open the thread and reach out once more.

Thanks again for your report, and thank you in advance for your patience as the ticket progresses through the development queue for review. Please be on the lookout for changes in Early Access or in Software Release Notes in a future Roon build!