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Subject: Re: Ipod RBX and M4A

Re: Ipod RBX and M4A

From: Magnus Holmgren <>
Date: Mon, 06 Aug 2007 20:40:14 +0200

Paul Louden wrote:

> Remember that HE-AAC, when played by a player that doesn't support
> HE-AAC, will ignore the SBR and be played as a standard AAC at half the
> sample rate. Wouldn't this result, in the case of improper sample rate
> handling, in a file that plays double speed?

It would, and I've tried to make sure it doesn't happen. Could be the
problem here, but given the bitrate of the file, I doubt it is the case.

> At least, if my understanding of HE-AAC is correct, that is. I don't
> know if our player does this, or if it simply attempts to use the SBR
> and runs out of CPU power.

It uses SBR but is only really capable to do it on Gigabeats.

Received on 2007-08-06

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