ya thats what mine is well, now some what based on but UPDATED! Giving better audio quality and above all bass, also i fixed the clipping with using head phones. Granted its not perfict yet but its a LOT better then the orignal opamp hack. The roastbeef mod is an exelente foundation AND STARTED IT ALL. But its lacking sound quality and the broad range of things that you can plug it into, and get the same result is farly limated. My next project is to put a switch on the board for line or powerd output.
KEEP IN MIND THE ROAST BEEF MOD IS NOT DESIGNED FOR THE NON YAMAHA SOUND CHIP'S!!!! It requires different setup!!
And I hate to bring back old memorys but the dual rs232/audio hack which cost's more, has a flaw in the audio hack part. I WILL ADMIT ITS AN AUSOME "DUAL SERIAL" HACK THOUGH!
Now I'v pointed it out time and time again, and I've still got the schematic for the board somewhers. But the audio hack is wired worng, basicly you cant mix the serial and audio and other features on the same board. The reason you ask? Well because there is interfearing noise. Giving people a degrated audio quality. Ever pluged a fan into the same POWER outlet as a TV or radio hehe same idear. If you dont know what i mean BY ALL MEANS TRY IT!!! Best of all this is NOT an extream example.
There was a whole stink about it a while ago and still nothing was ever realy done about it.
Thats part of the reason why I never went with doing the dual board like I was offerd a long time ago. I didnt believe in mixing all items! Neat idear but to get the Best audio quality you MUST seperate the VOLTAGE BASED SERIAL PORT, the FAN power port and the AUDIO!! Yes serial information is based on VOLTAGE LEVELS NOT ttl or data line level (On/off). Max 232 chip's convert ttl data into analog. Why do you think you can use such a long serial cable! its analog. This means you have voltage surges and drains (brown outs, Granted they are small but its enuff to cause problems). Then you put a pulsing fan on top of that. And the audio is tied into the same line's as BOTH of them, And even still your talking about traces on the iopener MOTHER BOARD which are not designed to supply all this stuff? COME ON!!
I'm not trying to bash though I am kind of, but I'm just pointing out the safty fact's. I am sarry for bashing but fact's are fact's.
Here is a question you can ask ANY ELECTRONICS PERSON OR local audio store. (audio store i dont mean wall mart, but rather in-town peole who know what there doing)
ask them this
"Do you think that if I mix a very basic audio amp, which is nothing more then an opamp and a few caps, a 5v dc fan and an voltage based serial anolog data line on one board all running off the same power source and non shielded IN ANY WAY from each other on the board? do you think the audio will get distorted at all? Or will any of them interfier with each others preformance?"
If they ask specifics on any parts tell them the audio is for powerd audio out for headphones and powerd amps. The serial is A puter SERIAL port. and the fan? ahh thats a hard one ;) .
I DARE YOU!!
Again if you want specifics email me.