change audio sampling rate without reencoding?

[yingx2]

Is there any way to change the sampling rate of an audio file (mainly DTS, AC3 and AAC) without re-encoding it? The intention is to slightly speed up/slow down an audio file and I don't mind the the pitch change and arbitrary sampling rates.

I know that reclock can do it but I want to change the sampling rates permanently. Any recommended tools?:thanks:

[yingx2]

Any ideas?

[b66pak]

mux in mkv with mkvtoolnix and adjust "stretch by" in "format specific options" for the audio track(s)...

example:
input clip - mkv@24000/1001
output clip - mkv@30000/1001

load input clip in mkvtoolnix, select the video track and in "format specific options" change the "fps" to 30000/1001, select the audio track and in "format specific options" change the "stretch by" to 4/5 [(24000/1001)/(30000/1001)]...the result will be a speedup clip with a-v in sync...
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