T-Force Alpha Plus by Mastrcode Music is a great sounding free subtractive/FM synthesizer. You can easily get out those uplifting trance sounds from it and a lot more.
Here are some technical details (quote from Mastrcode Music website):
Alpha Plus is the advanced version of the T-Force Alpha TS. It has all features of the Alpha TS with some more and some updated functions: new synthesis (Subtractive and additionally FM Synthesis), revised oscillators with some more functions and now with a separate noise oscillator, new Mod Envelopes and now with a new integrated Sidechain FX (e.g. for the typical side-chained pad sounds and/or pumping basses etc.).
- Synthesis: Subtractive/FM.
- 3 Multiwave Oscillators with voice control (adjustable from 1 to 8 voices per osc), adjustable stereo width and panning, with Sine, Saw, Ramp (reversed Saw), Triangle, Pulse (square with PWM) waveforms and retrigger option for each oscillator (with “retrigger off” the oscillator is in free running mode, the oscillator starts with random phase positions everytime played a note, with “retrigger on” the oscillator’s phase starts from position 0 everytime played a note.
- 1 Noise Oscillator with adjustable stereo width and volume.
- 1 Resonance Four Pole State Variable Filter, switchable between Low Pass, High Pass, Bandpass and switchable 12/24 dB slope, Resonance can be driven up to self oscillation.
- 1 ADSR Filter Envelope.
- 1 ADSR Amp Envelope.
- 2 ADSR Mod Envelopes.
- 2 host syncable LFOs.
- Adjustable Drive function for Saturation/Distortion.two band Low Freq/High Freq Equalizer.
- 32 step Envelope Controlled Trance Gate.
- Velocity control (on/off).
- Dual Delay, switchable between Stereo mode and Ping-pong mode (right and left channels have their own tempo settings).
- Stereo Reverb.
- integrated Sidechain FX, optional with internal bpm synced triggering or external triggering via MIDI In (triggered by MIDI Note On, on MIDI channel 2).
- all functions fully automatable.
Check some sound examples and features from the video below:
I can only recommend this synth! 😎