Some Music Plays Very Slowly Over Network (XBOX 360)

I have my xbox networked to my PC so I can listen to my music while I play games. For some reason, just in the last few months or so, some music plays at like a quarter its normal speed over the network. I have tried to move the music off my external hard drive and copy it back on and while doing so, removed it from WMP and loaded it back in so it was available over the network. Didn't do anything.

I don't know what could be causing this issue and I haven't been able to find any information about it online anywhere. Any ideas?

Sometimes it's a track off an album... Sometimes it's an entire album. The mp3's that are causing the issue come from different sources, too. Some from the internet, some I purchased from Amazon, some I ripped using iTunes, some I ripped using another software program. There's no consistency at all, so I don't think it's the files themselves... Just something weird with the network. It always happens with the same files, too.

Speedtest.net by Ookla - My Results

My Xbox and my computer are plugged into my Comcast modem through ethernet... No wifi. I have one of the new Comcast modem/router combo modems.

It seems to be an issue with the files. I ripped one of the CD's in question this weekend and copied the new rip to my external hard drive, added the new version to WMP and streamed it to the Xbox and it played just fine.

NIC: Broadcom Netlink Gigabit Ethernet (I think that's what you're after)

The ethernet cable going to my PC is Cat6... I'll have to dig up a flashlight or something to see what I have running to my PC because it's under my desk.

Here's what happened tonight:
So I have two really banged up copies of this CD that I ripped to my computer. I ripped both to my PC to see if I could piece together an album from each of the albums (hopefully their scratched in different spots so if a track is scratched on one copy, it won't on the other...). I copied the tracks to my external hard drive and loaded them up into WMP and started streaming them to my Xbox while I played some games.

Every single mp3 played at normal speed except one, and both copies of that one MP3 were playing in slow motion. It's the weirdest thing... I can't replicated it 100%... Like load an MP3 in and know for a fact it's going to do this, but if an MP3 or album does play slow, it will always play slow... At least until I re-rip it and replace what's currently on my external hard drive with this newly ripped version.

When I say sometimes it's a track off an album, I just mean that the entire album worth of mp3's will play just fine except one track which ALWAYS plays slowed down.

Sometimes, it's every mp3 on an entire album that will play slowed down.

For instance, I listen to a lot of old techno/trance stuff... I was trying to listen to Keoki's DJmixed.com album and every single track off that album would play slowed down to like a 10th of the normal speed. I deleted the mp3's and ripped the cd again. After that, I can play it just fine, but before I did that, it would play that album that slow every single time I would queue it up. I also tried cutting it from my external drive and pasting it to my desktop, then cutting it from my desktop and pasting it back on my external drive. Didn't fix it.

Last night I was listening to Disco Deathrace 2000 (also Keoki) and every single track played just fine except one track which would always play in slow motion. So all but one mp3 streamed 100% perfectly, but whenever that one track would come up, it would play super slow.

I've had this issue on other albums, too. Nine Inch Nails' Hesitation Marks album streams fine except "Find My Way", which streams in slow motion, all of the mp3's from the Fight Club Soundtrack stream in slow motion... It's totally hit or miss as to which albums stream slowly, but if an mp3 does stream slowly, it will always stream slowly. It's not like one day it's slow, the next day I try it and it's fine.

I have tried streaming while just sitting on the Xbox Live dashboard and I get the same results as if I were playing online.

Yeah, I searched and searched and couldn't find anything, so I posted here hoping to find someone who had had this issue before.

I've tried to get something posted to the xbox forums, but I can't get the site to work. It's screwed up somehow.

Thanks for your responses anyway.