Unwanted Pitch shift

[musikkus]

Just beginning my first serious editing/mastering project in Audacity and am getting about a 10% upward pitch shift. Device chain is as follows:

Original recording on Alesis Masterlink @ 24/44.1
S/PDIF out to TC Electroncs M2000 digital reverb
S/PDIF out to Alesis IO/2 USB interface into
Dell laptop running XP

FYI the M2000 in S/PDIF mode dithers to 16 bit, the IO/2 is a 24 bit unit.

The pitch shift also occurs running directly from the MasterLink into the IO/2.

Where is the change happening and what can I do to correct the problem??

Thanks in advance for any help.

[kozikowski]

There are instances where Audacity had troubles dealing with 24-bit sound. Does it still do that if you try production at 16-bit or 32-bit floating?

Koz

[musikkus]

It gives the same result no matter which bit rate I select within Audacity. It does not do it if I go analog in from the same source.

[gaddis]

I am also having a pitch shift problem. In my case I am recording from an analog source and it is shifting down about a half step. I'm using version 1.2.4 . Any ideas?

[steve]

I am also having a pitch shift problem. In my case I am recording from an analog source and it is shifting down about a half step. I'm using version 1.2.4 . Any ideas?

1) Update Audacity - 1.2.4 is obsolete. (you can install both 1.2.6 and 1.3.x but you can only run one at a time. Projects that have been saved in Audacity 1.2 can be opened in 1.3, but projects saved in 1.3 can not be opened by 1.2)

2) Try changing the default sample rate (Edit menu > Preferences > Quality tab). If it is set to 44100, change it to 48000, if set at 48000 change it to 44100.

[gaddis]

OK thanks. I will try that. My default rate was 44100. I also notice that the "recording device" in my AudioIO tab was set to Microsoft Sound Mapper -input. The recording tutorial says not to select this if you are running Windows XP (which I am). Could this have any effect?

[steve]

I also notice that the "recording device" in my AudioIO tab was set to Microsoft Sound Mapper -input. The recording tutorial says not to select this if you are running Windows XP (which I am).

I think that the tutorial says not to use Microsoft Sound Mapper input if you are recording from a USB device. If you are using a conventional (internal) sound card, then in most cases it is OK to use the Microsoft Sound Mapper.