Problem with the microphone/input changing the pitch

[ambientdroid]

Hi,

I have a Toshiba Regza T-01C running 2.1-update1. I *think* these phones are only available in Japan.

I'm a musician so was pretty excited about the idea of using my phone as a guitar tuner and as a type of audio 'notepad' using sound recording apps.

The problem is that the phone seems to increase the pitch of the sound going into it's mic.

I had the gStrings guitar tuner app: If I tuned my guitar using a normal tuner (or against reference pitches on the internet) then compare it to the phone app, it tells me the sound is too sharp (high).
If I tune to what it says than compare back to a real tuner, the strings are too flat (low pitched).
After much googling i couldn't find anyone else with the same problem.

Today I downloaded Hi-Q MP3 recorder (lite) and Tape Machine (lite): after recording a short clip the play back is over one semitone higher than what I originally played. This is the same across both apps.
I also find that if I record a metronome, the play back is quite a bit faster. This is the same across all available bit-rate settings in the app.


So it would appear that perhaps the mic might be using a lower sample rate than the play back? How could that affect the tuner that works in real time?

The results are the same if I transfer the files to my computer for playback.

Curiously, the voice recorder in the 'Starmemo' app that came pre-installed plays back at the correct speed and pitch. Though the sound quality is awful.

Any ideas on what might be causing this and how I could fix it?

Cheers.

 

[sitlet]

So it would appear that perhaps the mic might be using a lower sample rate than the play back?

While the microphone certainly isn't very high quality, I have gotten VERY good recordings from Tape Machine. If you hear the pitch difference in that app, then its likely a hardware problem with the microphone itself.

You can try to do a factory reset on the phone, and see if that clears anything up. If not, the only other solution is if you are still under warranty, take it back to your carrier and see if they will give you a replacement. However, it could just be that device, and the way they designed the microphone on it, so that may not help.

 

[ambientdroid]

While the microphone certainly isn't very high quality, I have gotten VERY good recordings from Tape Machine. If you hear the pitch difference in that app, then its likely a hardware problem with the microphone itself.

You can try to do a factory reset on the phone, and see if that clears anything up. If not, the only other solution is if you are still under warranty, take it back to your carrier and see if they will give you a replacement. However, it could just be that device, and the way they designed the microphone on it, so that may not help.

Yea the quality seems ok, it's just the speed pitch thing.

My wife's got the same model so I'll have a play around with hers to see if I can find out if it's just a part of the design.

I wonder why they'd do that though.

 

[bobolacupcsr]

I have the same issue with pitch on my xperia x10 on the "hi-q mp3 recorder" app: its a semitone or two higher...

Did you find a fix for this or did you get a replacement phone?