Are you able to speak more to how the MXR compares to the other synth pedals you have?
I have both the Future Impact v4 and Source Audio C4, which I use heavily both live and in the studio. The C4 is likely to remain my primary live pedal, as I just know it so well at this point, and have so many go-to presets programmed, and it's "secret" multi-fx uses as octaver/fuzz/filter are massively helpful for my uses.
However, I am super intrigued by the MXR pedal for studio use, where I can immediately dial in and tweak sounds on the pedal, and keep away from additional software/screens.
In particular:
- how is the sound quality of the oscillator waveforms without any filtering...etc?
- what range does the filter have? Can it fully close to no audio output? Does it fully open?
- does the voice button work similarly across oscillators? I am assuming it essentially cycles between various oscillator stacks: octaves, fifths, unison...etc? Would love to understand/know better what this is doing?
- is the sub a preset oscillator? Assuming Triangle or Sine?
- does the envelope control feel broad and intuitive enough? can it get super tight/plucky sounds, and do these feel snappy and consistent? Is it possible to get sounds with a slow attack but quick decay?
Needed to get some more time with it to try to answer as best I could! I don't currently have the best computer setup in my home space to deep-dive test all my current synth pedals directly against each-other since most of the other options will require computer editing to try to match directly, so currently mostly comparing on simple feel/response.
I did just pull out the FI V4 for a bit deeper direct comparison today (the FI V4 is definitely my current baseline as it just tracks/sounds so solidly to me) and I have to amend my tracking comparison vs the MXR- I'd have to say the v4 Future Impact has a more significant tracking accuracy advantage vs the MXR than I had first imagined though the MXR still has no noticeable latency to my ears in 4-string mode. This became more clear with a particularly difficult bass (a 6-string with rounds that has issues with ringing strings if I'm not very careful with muting), the Future Impact v4 is much more forgiving to a sloppier input signal (the v3 Future Impact was definitely much less forgiving, the v4 improvements are significant!) while the MXR can get glitchier/choppier without the Gate turned down (which then cuts the sustain of notes). My main basses are 4-strings with flatwounds, and with those the MXR is much less touchy- it actually tracks phenomenally with my NS upright too! With this tricky bass I need to be much more careful with the MXR than the Future Impact, though the
speed of tracking on the MXR is still right up there when in 4-string mode (which is fine for my uses) and still pretty impressive in 5-string mode though it does feel little looser to me.
I'll have to dust off the C4 as it hasn't really gotten much mileage since the Future Impact update as well as the Neuro 3 software update nightmares (which I think are finally sorted out?). For me, I've preferred the feel of the Future Impact v4 to the C4 for most of the synth sounds though the octaver tones of the C4 are great and the filter can be easier to set up.
There is a punch/immediacy to the MXR that isn't as easily felt with either the Future Impact or C4 for me- particularly felt with some of the snappier envelope sounds that feel more like my analog pedal chains. For that reason (at least for me) and for the ease of tweaking, it will probably be a keeper as a "leave it in the pedalboard case" synth option. Both the C4 and Future Impact are of course
much more tweakable, and both do a lot of things the MXR can't touch.
Answers for your questions to the best of my current ability:
-The Osc waveforms sound solid to me when soloed (I'll have to get my other pedals hooked up to a computer to directly compare, but they sound basically like my digital synths when I turn off the filter and put cutoff on max)
-The filter can completely close to silence, and at least to my ears the top end seems to open to the point that I hear no obvious treble filtering- I'd have to setup Room EQ Wizard to test on the computer to be sure of the high-end frequency response.
-Setting up the filter envelope for the desired response can be a bit tricky- there is a lot happening between two knob parameters (and the Gate seems to affect envelope response as well): the Envelope parameter sweeps between a range of fast attack/decay at the first half and slower attack/decay at the second half, then the Filter Envelope Amount (secondary) parameter sweeps between downward sweep - amount in the first half and upward sweep + amount in the second half. The downward sweep in the slower attack settings swells back to the highs more than I'd like and with lower Gate settings (like needed with my 6-string bass) getting a full sweep can require really digging in. My favorite sounds are on the first half of the Envelope sweep where all the punchy/snappy settings are- and where I think this pedal shines (the Chameleon preset in videos is a great example of one of these snappy envelope sounds).
-I assume your envelope question is regarding the filter envelope, and yes those snappy settings (using either upward or downward sweep) are my favorites so far and reminiscent of my Chunk Agent 00 Funk filter in response (a great thing!).
-the "Shape" selector chooses the waveform for all oscillators, so the Sub, Unison, and Voice will always share the same type of waveform.
-the "Voice" is just an on/off button and has the same function regardless of waveform, and turns on (
to my ears, and according to a few videos) an octave up and an octave+5th up oscillator. You can't blend between those two high voices, but there is a secondary function that blends between these two combined voices on one side and the unison voice on the other (when the "Voice" button is engaged- when it is turned off you only have the unison voice regardless of this mix setting). Then the Sub Mix blends between the combined (Unison/octave up/octave+5th up) signal and the Sub oscillator signal. I think the voice is most useful for me for just adding a bit of upper harmonic signal, really nice for sub-octave filtered sounds.