Can't get my head around this audio issue MBP 2009

Mar 9, 2015
Reaction score
Hi everyone,
Very happy to join the community!
I bought this MBP in 2009, Intel Core duo 2, 2.53ghz, 8G ram (added myself) running OSX 10.6 snow leopard (I think).

So my issue is that when I playback audio through the headphone jack from software like iTunes, Ableton Live, VLC, etc the sound sounds horrible: over compressed, super bassy, sounds like it’s ‘playing double’ as I can sort of hear a very short delay. Very bad. I already checked EQs, etc. Same issue for both software. Also It didn’t used to be like that. It kind of just appeared a couple years ago. I have played small gigs straight from the headphone jack and it sounded fine.

However, when I play audio through the headphone jack from internet apps like Youtube, Soundcloud, etc, everything sounds fine. So this tells us that it should not be a hardware issue.

Also I produce loads of tracks on ableton live and usually playback everything through an external soundcard, no issue there either. The issue happens only when playing audio through headphone jack from software playback only. As a result I never take my MBP out as I can’t take the audio quality from headphones when working on tracks.

I searched about this topic which brought me to the Utilities>Audio midi settings.Everything looks like it should. iTunes and ableton are updated to their latest version.

What do you reckon I should do? Reset to factory settings? OS update to Maverick? But then isn’t my MBP too old for the latest update? Also read about a PRAM reset.

Thank you very much for your help and your time!!
Le Filou
Last edited:

Shop Amazon

Shop for your Apple, Mac, iPhone and other computer products on Amazon.
We are a participant in the Amazon Services LLC Associates Program, an affiliate program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.