Vintage Synth Repair

Hi All,

	I have an Arp Odyssey that I used for the first time in a good 9 
months and found this previously non-existent problem: whatever I do it 
will always be playing a note! So if I press a key on the keyboard that 
pitch will sound but continues to sound after I've released the key. As 
you can surely tell I'm very new older synths so I'm guessing I could 
be doing something wrong. I've been setting up patches from the manual 
but that same thing happens. It won't stop playing a note!

	Thanks in advance,

	Nick.