Odo Synths has released a new free/donationware Windows synthesizer,  Double Six XXL.

Double Six is a 6-operator FM synth with 32 DX7 algorithms and 16 4-operator algorithms.

Features

• 6-operator FM synth with 32 DX7 algorithms and 16 4-operator algorithms.
• Every operator has its own envelope. You can choose between 1 and 8 stages and set the sustain point from 1 to 7 or off.
• Every operator has a clipper,overdrive,lowpass filter,and a distortion.
• 2 octave sequencers with Destinations operator 1 to 6.
• 4 envelopes with retrigger mode on BPM rates.
• 3 LFOs with 19 different waveforms with 16 different BPM rates and free rate(manual) mode. Destinations of the LFOs are pitch operator 1 to 6,phase monulation 1 to 6 and cutoff
• The LFOs can start free (anypoint of the lfo waveform) gated starts when you hit a key or first (starts when you hit play in the sequencer).
• A octave pitch
• 14 different curves for the envelopes.All envelopes have a time knob.You can switch between the envelope and volume.
• The operators can be disabled, fixed or pitched and have a octave range from -6 to 3, fine-tune and pulse width.
• 11 different waveforms for the operators.
• The filter has the same envelope and there are 10 different filters types low-pass 12db,low-pass 24db,low-pass db32, hi-pass,band-pass,CK low pass,CK Band pass,CK hi pass,CK notch,CK,peak.
• Volume envelope.
• EZ preset: This allows you make new sounds fast. You can reset all fine-tunes with the hit of a button or change all waveforms, set all the octaves the same and the times of the envelopes.
• Phase modulation depth control and a feedback control
• Volume envelope.
• Note sequencer
• Built-in effects are Chorus, stereo delay, gater,clipper,ovedrive,distortion and phaser effects.
• Velocity controls
• Voice/poly control