Unlike the Atari STe the STfm doesnt have a sound output so you either need to make one yourself, buy a monitor cable with outputs for the sound or use the sound from the TV. I didnt have the time or the money for the monitor cable and using the Tvs output was no good since the RF cable you use to connect it to the TV picks up alot of noise. So I did the first or to be correct my friend Salkin did it for me :). He added a 1/4 inch jack mono jack to the left side of the case and connected to wires to the monitor output pins inside the atari. One wire to pin 1 which is for the audio and one wire to pin 13 which is for the ground. So now I can hook it up to my mixer and enjoy some great Atari trackers such as Musicmon 2.5 and maxYMizer.
|3||GPO||General Purpose Output - linked to Port A bit 6 of the sound chip, user programmable|
|4||M detect||if line is low, ST enters high res monochrome mode (no other use) linked to pin 17 of MFP68901 chip|
|8||+12V||+12 VDC (520ST has GND)|