I have been recording sets straight from my turntables.mixer to my mp3 player or computer. Doesnt matter which way i record everytime i play it over my transmitter through my radio it sounds like its underwater. The mp3 plays fine on my mp3 player and my computer though. Any ideas?

sounds like the transmitter is amplifying the compression the mp3 has... make sure the bitrate is 320k+

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And make sure it's not a 99 cent transmitter from your local Stop-n'-Shop or whatever

Does it work with other media from your computer?? is it just the mp3s?

Sorry, i forgot to mention that every other mp3 i have works perfectly, no matter the quality. Its only when i record my own sets from vinyl. i have tried both recording from computer and straight to the mp3 player and neither works.

not really a stupid question, i just know there are alot stupid people in the world... so with that, you are using a mixer right?

yep. Recording from the master out

i just have no idea why the problem is specific to when i record a mix and transmit it to me radio. in any other situation it sounds fine, eg. on my computer, through my mp3 player. And its not the transmitter because every other mp3 i have works perfect.

I read something about DC offset, would that have any effect?

Yup that sounds like it may be it.
The pricipal of a speaker is quite simple.
It gets a dc signal telling it to go in and out in and out.
The dc ofset changes the middle that it moves around.
Since the dc offset is off it may not broadcasting properly or recieving or the speakers its playing on cant handle it. Im guessing that it cannot be braodcast and this would be to prevent people picking up the single getting their speakers stuffed.
If you have the dc offset too much you can stuff your speakers because very deep excursions = no good. What are you recording/encoding with?

im recording with audacity.
Would this also explain why i cant record it straight on to my mp3 player and transmit it to my radio?
Do i select it all and put DC on or do i have to record it with DC on?

Can you send me some of the mp3?
I will take a look for you.

quote:

Originally posted by DJ 00 Tommy The pricipal of a speaker is quite simple. It gets a dc signal telling it to go in and out in and out.

Don't mean to be picky, perhaps a typo, but speakers are driven by Alternating Current (AC).

When you play the MP3 you recorded through the MP3 player, how does it compare in level to the ones you buy? Are they at the same volume level? If it is higher, perhaps it is too hot for the transmitter to handle. See if turning it down helps. (May have nothing to do with this tho)

There is no difference between volume levels. There are ones that are louder that work fine The quality is the same. Im 90% sure its got something to do with recording from a non-digital source although i know nothing about recording and transmitters.
I will try recording with the DC offset on and see if that works.

i'm not sure of the purpose of DC offset, but I imagine it is to counteract a DC source possibly within the unit. ie to negate the effect on the speakers in this case earplugs.

I just want to clarify, if you record a track off the mixer into the mp3 player, and you listen on the headphones, it is ok, and if you download a track and transmit it across to stereo, that is ok too, but if you transmit the track played via the mixer, it doesn't work clearly.
Is that right?