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Subject: Re: Noticable Pop Between Tracks (Sansa)

Re: Noticable Pop Between Tracks (Sansa)

From: Michael Sevakis <jethead71_at_sbcglobal.net>
Date: Mon, 16 Feb 2009 20:08:29 -0500

>
> What I wrote was about as specific as I can be. Nothing unusual about
> settings. I probably should have said "discontinuity" instead of "pop",
> however, though the result is the same. I don't believe rockbox is adding
> any noise, there's just a very slight pause between tracks.
>

I do recall a bug when I first started using rockbox that seems to gone now
where I would get a small glitch between contiguous tracks. It was Frank
Zappa (who tends to do alot of gapless tracks), not classical but still
quite audible.

> Best advice I can give for replication is that someone play something with
> uncompressed (or minimally compressed) audio content and no breaks between
> tracks. Crank up the volume and use good headphones. It's really
> noticable in opera recordings, with lots and lots of discrete tracks.
>

I have sinewave test tracks that stitch together seamlessly but it's been
awhile. That's the waveform that reveals the most with sample problems since
it otherwise lacks overtones. I will check again however and make sure they
split at a peak or trough. The PCM output from a preceding track should be
butted right up against the output from the following-- nothing added or
deleted (with the exeption of what gapless headers indicate to be stripped).

> Not really on-topic, but "compared to other MP3 players" is the key
> phrase. Virtually all portable players are underpowered. Good enough for
> loud pop albums, but anything with any dynamic range suffers.
>
> Needless to say, I've been watching the hardware projects with great
> interest...

If you want a ridiculously loud player, then a Gigabeat S (way overpowered)
is your friend and has no noise issues from digital circuitry like the
Sansas (that I've observed).

Mike

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Received on 2009-02-17


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