Great, I love the OP-1. What a cool synthesizer!
Setup steps:
1. 3.5mm from OP-1 audio out to Scarlett 2i2 Input #1.
2. Try setting Scarlett 2i2 Input #1 to “Line”, not “Inst”.
2. When you play a note on the OP-1 make sure that the light around the Scarlett 2i2 Input #1 volume knob becomes green, not red (too loud), not off (too quiet).
3. From OP-1 manual: “To adjust the output level, turn the volume knob or set the master L/R level output located in mixer T4.”
4. Test your setup by recording and listening to yourself with Audacity (
http://www.audacityteam.org/download/).Once you reach this point you'll have a working OP-1 recording setup. I not going to list the steps for connecting speakers or headphones to the Scarlett 2i2 but you should be hearing yourself through the speakers/headphones.
Now start jammr and go to File | Settings… | Audio. Select WDM-KS as the audio system and the Scarlett 2i2 as input and output device. A sample rate of 44.1 kHz or 48 kHz should be fine. The latency setting should be between 5-12 milliseconds. Make sure the “Play back my audio” checkbox is enabled. Sound setup done!
Go to File | Connect… and select a jam session to join. You should hear yourself through your headphones/speakers.
Make sure the “Send” button in the lower right corner of the jammr window is enabled (dark gray) so that other people will be able to hear you too.
Stefan