iTunes: SidTracker64 - Daniel Larsson
"SidTracker64 is the ultimate chiptune production package tool for the iPad. It emulates the SID sound chip from the dominating home computer of the 80s - The Commodore 64.



Editing is based on hands on touch interaction or midi input instead of the hardcore style of direct data editing. Record live to a metronome or input notes step-style. Real SID-composing has never been simpler and more fun!
SID synthesizer engine specs:
· Fully emulated SID 8580 R5 chip.
· 3 separate voices
· 8 waveforms - tri, saw, pulse with pwm, noise, trisaw, tripulse, sawpulse, nowave
· Wavetable editing
· 3 volume envelopes
· Dedicated vibrato controls
· 1 multimode filter LP/BP/HP (12/6/12db) with sweep envelope
· Filter table editing. Change filter cutoff and modes up to 1/240
· Hard sync and Ringmod per voice
· PWM sweep envelop
· PWM table editing
· Hard restart
· Variable emulation speed from 25-240hz (standard 50)
· 32 instruments per song (copy/paste/rename)
Tracker (sequencer):
· 3 voice patterns
· Mute voices on/off
· Change instrument per step
· FX pattern - change volume/filter/speed per step
· Loop pattern
· Song building
· Live or step recording
· Metronome / count in
· Follow mode
· Note effects (Glide/sustain/vibrato/filter & pulse reset/tie)
· Song mode with transpose
Midi:
· Keyboard input 1-3 voices (mono, duo and polyphonic)
· CC-assignable synth parameteras
· Modulation wheel vibrato
· Pitch bend
· Midi Clock in
· Selectable input channel
Export:
· .s64 - native SidTracker 64 file
· .m4a - audio
· .sid - for use in sidplayer
· .prg - exports play data for a real Commodore 64"