[Tilt, TyTN II, MDA Vario III General] Rumball:
Hey everyone. I'm new to the xda-developers forum (but not to PPCs) and just picked up myself a Tytn II and ran across the same issue as described in this post. Basically MP3 playback skips/stutters repeatedly every few seconds.

In my case I have found out what's causing it (thought not "why") and how to prevent the skipping from occuring and so I'm sharing it with you all in case it helps others.

First off all, my Tytn II's skipping/stuttering problem occurs when streaming music via A2DP.

At first I couldn't figure out why I would sometimes have amazing quality audio through my bluetooth receiver and other times I would have the horrible stuttering and then just this morning I found the source of the problem.

To listen to A2DP audio in my car I have a Sony HWSBTA2W Bluetooth audio transmitter/receiver plugged in to my car stereo's AUX-in. My car also happens to have a built-in bluetooth handsfree system. When my car's bluetooth is turned off the streaming of audio from my Tytn-II to my Sony bluetooth receiver is absolutely perfect...I couldn't ask for better sounding audio. As soon as I turn on my car's bluetooth handsfree the stuttering/skipping starts to occur. The moment I shut off the car's bluetooth the audio returns back to perfection.

So that solves it for me. I'm not quite sure why this is occuring yet but I plan to do a few more tests. Here are two theories of mine which I want to test.

1) It may be that having another bluetooth device (my car) paired and communicating with the Tytn-II during MP3 A2DP streaming causes the skipping. If others have multiple bluetooth devices maybe they could test this out.

or

2) Maybe the three devices' signals are interferring with each other. The Tytn-II and the Sony receiver are both Bluetooth V2 (which are supposed to be less susceptable to interference) but I'm not sure about my Nissan Altima's handsfree system. Anyway...something I want to try out with other bluetooth devices I have.

So anyway, that's what I have to contribute to this discussion thread...hope it helps.

Dec 19 Update

I've rulled out bluetooth interference by turning on my car's bluetooth handsfree system but pairing it to another mobile device rather than my Tytn-II. In this configuration I still have perfect skip-free A2DP music. So it looks like if I have my Tytn-II paired to a bluetooth headset AND paired to another device with A2DP, the music skips horibbly.

January 31/2008 Update

I have now been able to get my A2DP streaming to work flawlessly even while connected to my car's handsfree system... however I haven't narrowed down exactly what fixes the problem since it comes and goes from day to day. I need to do more testing in my car but it seems like when I run into the problem, if I cycle the bluetooth OFF/ON and reconnect my A2DP then the problem goes away. The interesting thing is that the audio seems fine in the morning but terrible in the evening. The differences that I know of off hand are that in the morning I turn on bluetooth and so the car handsfree system and the A2DP stereo are the first devices to connect. In the evening I'll be coming home from work where my device has been auto syncing via bluetooth all day. I'm starting to wonder whether the stuttering that occurs periodicaly is due to some left over activesync process trying to startup periodically and maybe shutting bluetooth OFF and back ON again stops this process??? Oh well...I'll keep trouble-shooting this problem and post here if I figure out what work-around fixes my particular problem.