I’m saving my pennies for a Sequential Prophet X, it’s on my 2019 buy list. It’s a stretch for my saving capabilities but I like this synth that much, I just might make get there. It may not be the case in the long run, but I think I can exist with this as my sole polyphonic till death do us part, ha!
Essentially the X and the XL are identical machines, except the XL is larger, and has a 76 key semi-weighted keyboard. The X has a 61 key semi-weighted keyboard.
I’m a Pro 2 owner, so the features and controls on this synth I am very comfortable with. Dave Smith’s feature set and design are near perfect in my opinion.
With essentially 4 oscillators (2 digital oscillators and 2 sample instruments), it has 8 voice-mode stereo, 16 voice-mode mono, and 32 voice-mode paraphonic with a single oscillator and sample instrument. Halve those in stacked or split modes. Its bi-timbral capabilities are something I look forward to. Be sure to install the v184.108.40.206.1 or newer OS to get the full voice functionality.
The sample abilities are incredible, plus you can add 50GB of user-imported samples or 3rd-party samples (see the Mapping Utility videos in UO X/XL Samples & Presets YouTube Playlist below).
The X/XL has a polyphonic sequencer with 64 steps and up to 6 notes per step, with unique sequences for each layer if working in stacked or split voice mode.
Finally, this synth has an incredible effects section, 2 effects per layer, with multiple reverbs, 2 delays (standard and BBD), chorus, phase shifter, flanger, ring mod, vintage rotating speaker, high-pass filter, and distortion.
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Prophet X/XL Specifications
2 multi-sampled stereo instruments per voice with editable sample start, sample end, loop size, and loop center, loop on/off, sample reverse, sample stretch, bit-rate reduction, and sample rate reduction
Forward and forward/reverse loop modes
150 GB of factory-installed 16-bit, 48 kHz sampled instruments created by 8Dio
50 GB of additional storage for user-imported samples or 3rd-party sound libraries
High-pass and low-pass filter per instrument
Instrument 1 and instrument 2 delay as mod destinations
2 digital oscillators per voice with selectable sine, sawtooth, pulse, and supersaw waves. You can vary the shape of any of the waveshapes.
Glide (portamento): separate rates per oscillator; (samples can glide in Sample Stretch mode)
2 x analog 4-pole resonant low-pass filter per voice
Digital high-pass filter in Effects section
4 loopable, five-stage (ADSR plus delay) envelope generators: Filter, VCA, and two assignable
Polyphonic step sequencer with up to 64 steps (6 notes per step), and ties and rests.
MIDI note output
Sequences can be copied between Layer A and Layer B
Four-stage (ADSR) envelope generator
Velocity modulation of envelope amount
LOW FREQUENCY OSCILLATORS
4 LFO’s with key sync, phase offset, and slewing per LFO
Five wave shapes: triangle, sawtooth, reverse sawtooth, square, and random (sample and hold)