Kick & Snare: Split signal in 2 ways: 1) Connect sequencer to Random bit (noise generator) with Envelope (no attack and one half of decay) and a little delay. 2) Filter with very slight cutoff and 3/4 of peak. Mix back both two channels and send it to synth speaker.
HiHat: Connect Pulse to Micro seq, then the Random Bit (noise generator) and envelope with no attack and a light decay, filter with 100% cutoff and a high peak (just before it start to buzz). Use delay if you want to obtain 1/16 notes.
Before continue with bass and piano, tune your oscillators. You can use a guitar tuner or compare with another musical instrument.
Bass: Connect iOS device to Mic with option "other" selected. Then connect inverter and Micro sequencer with option "step" selected. Send the main output to keyboard, oscillator and envelope. Send the sequencer's trigger-out to envelope trigger-in. After envelope, put the filter with half peak and desired cutoff. Finally send it to speaker.
Electric piano: split signal to two oscillators and mix them back with mix bit. Filter the signal with one half cutoff and a low peak level and send it to envelope with no attack and 3/4 of decay. Overdub the recording of the notes played to get a chord.
Guitar: connect the phones output of your guitar amplifier to mic bit (if you don't have any amplifier you can use the AmpKit app like me). Connect the delay bit and play with the knobs.
Guitar arp effect: Use the same setup of guitar but set the microphone bit to "other" and connect oscillator after the mic.
Vocals: Connect microphone between power source and filter. The filter is optional, but you can get interesting phone-effect with it. I recommend you use a noise gate to avoid hiss after recording.
Brass: Put the keyboard and a tuned oscillator in sawtooth wave mode. Send to envelope with a low attack and one half decay. Send it to filter and a light delay before synth speaker output. You can overdub the notes as before with the piano keys.
Bells: Use the KORG SyncControl app connected to mic to synchronize rhythm. Connect a micro sequencer and send the main output to an oscillator and trigger output to random voltage generator and oscillator. Mix them back (very low volume on the random generated note) and process the sound with envelope, filter and delay.
After recording all these sounds in loops, mix it and you'll get a final song.
DJ Muuuu: Split the signal in three ways with fork. 1) Connect a split cable for RGB led (the main screen of the DJ) and servo motor (the little DJ's turntable); 2) Connect an oscillator with short decay envelope and synth speaker; 3) Plug the Light wire (this will be the colorful dancefloor). Assemble the stage with Lego bricks and use adhesive tape to fix the main screen (the post-it).