AAC-files static click between tracks 1 & 2 with gapless albums

First of all, I want to say how much I love Plexamp. I enjoy using it every day.
I work with Apple devices in combination with AirPods Pro 2. I have encoded my music library in AAC for that reason. That is good enough for my ears. It sounds great.

There is, however, a small annoyance with this format that may be easy to solve.
With albums like Oxygene and Equinoxe by Jean Michel Jarre, Dark Side of the Moon by Pink Floyd and other albums where the songs flow seamlessly into each other, there is a small ‘static click’ between the first two tracks of each album with AAC files. You don’t hear that with FLAC, ALAC, MP3 or Opus files (then perfectly gapless). The following tracks of these albums nevertheless play perfectly seamlessly one after the other.
This occurs with iOS & MacOS (latest versions).

I hope this can be solved. It would make Plexamp completely perfect for the way I use it.

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Please post samples of the files, AAC should be gapless.

Here you are: https://www.dropbox.com/scl/fi/yl82i7e5k5s4ias6w26rr/AAC-samples.zip?rlkey=j4xvgj2pa795du0bwkw0rxgpm&st=zjsip06e&dl=0.

They are, except between the first two tracks of an album.

We’ve done a bit of digging, and the gapless story for AAC files isn’t great. Other formats are better supported in this regard.

From @SE2Dev, who did research on it:

According to audacity, those fees those have extra data on both ends. ffmpeg to flac removes some of the extra data but it doesn’t seem to remove all of it. Also ffmpeg flac → aac adds the extra data, but ffmpeg aac → flac doesn’t remove the same data.

Mmm… thanks for digging! :+1:
A while back I noticed the exact same issue (click between the first two tracks of an album) with another player (foobar2000 for Mac), but now that player plays AAC perfectly gapless. Maybe this helps….?

I’m not sure what foobar does, but likely something non-standard, and since it’s not open source, we can’t check.

What puzzles me: why does this happen only between the first two tracks, while the rest of the album plays perfect?

Just a quick note to say that since the last update all the tracks now play perfectly gapless. Thanks!

Glad to hear!

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