M4a files playback too fast in WL Pro 12

[Brandoni2013]

When I open an m4a file recorded mono in 48 kHz with an iPhone, the playback in WL 12 is Mickey Mouse like too fast. When I open the same file in WL 11, everything is fine. Any idea??
Thanks, Holger

[PG1]

Can you share this file?

[Brandoni2013]

Thanks for your reply, PG. Of course I can share the file but I don’t see a button for uploading it to somewhere on the Steinberg server. Sorry for asking such basic stuff…

[PG1]

Write me a PM

[Slawomir_Szymanski]

I have the same problem. Any solution so far?

[Laturec]

See this thread:

Chipmunk audio after upgrading to wavelab 12

I have identified the problem now. It does not happen to me because the Fraunhofer decoder is active in my system (see further). Without this, the fallback decoder has a problem with mono M4a files, that will require a fix in 12.0.30. If you have WaveLab 12.0.20 and updated from WaveLab 11, you should be able to use the Fraunhofer decoder. For this, open the Steinberg Activation Manager. You should see the following and activate it. [image]

[Slawomir_Szymanski]

I see. But I can’t see my AAC Fraunhofer license to activate. I am on WaveLab 12 Trial and 11.2 full license. May this be the reason?

[PG1]

@Slawomir_Szymanski

But I can’t see my AAC Fraunhofer license to activate. I am on WaveLab 12 Trial and 11.2 full license. May this be the reason?

You need the full version of WaveLab 12, not the Trial.

[Brandoni2013]

I am on WL 12.0.20 full license and can’t see my AAC Fraunhofer license in the Steinberg Activation Manager either.

[PG1]

But did you upgrade from WaveLab 11? This possibility if only for WaveLab 11 owners.

[Slawomir_Szymanski]

I guess so. Thank you for your support

[Gr8h8m]

Hi - I’ve upgraded from WL11 Pro to WL12 Pro (and activated) and can’t see this AAC licence in the activation manager either?

[Brandoni2013]

PG, can you please confirm that you could reproduce the WL 12 problem of 48KHz Mono files playing back much too fast (Chipmunk / Mickey Mouse like)? The 48KHz mono file opens as a stereo file (=double mono). In WL 11 everything is fine!! It would help if you confirmed that this problem will be solved in the next WL 12 Update.

[PG1]

@Brandoni2013

PG, can you please confirm that you could reproduce the WL 12 problem of 48KHz Mono files playing back much too fast (Chipmunk / Mickey Mouse like)?

Yes, there is a bug that will be fixed in 12.0.30.
This concerns AAC mono files (stereo is ok), that are not properly decoded, when the AAC decoder is not active for WaveLab 12.