Analogue-sequencer

> I had a look at enapas P3 kit today and noticed that he's got 
> an old kit with a 18MHz crystal. This means that the firmware 
> available for download will not work since it is for running 
> the AVR at 24MHz as far as i know. 

No, the later CPUs at 24MHz have a different bootloader.
There's a byte in the bootloader that defines the clock frequency, and the
code adjusts as needed.
At boot, the later code will show either 18 or 24 in the top right of the
display.
That number must match the crystal frequency.
Note that the CPU is not an AVR - it is made by Atmel, but the CPU is an
enhanced 8051.

Best regards,
Colin Fraser
Sequentix Music Systems Ltd
http://www.sequentix.com