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The Radium KingMember
dunno, what ring mods do is pitch shift – take a 110 hz carrier wave, combine it with a 440 hz audio signal, and you get a 330 hz output – that’s a 330 hz pitch shift done analog. what is prolly digital is the control of the carrier wave to track the audio signal so that the pitch shift tracks.
a whole lot of supposition on one picture of a pedal!
The Radium KingMemberagain, my opinion is easily worth what you pay for it, but it is probably easier to do a ring mod analog than digital. presets, etc. , are digital, audio path analog.
The Radium KingMemberi think that a ring modulator is, by definition, single sideband (the audio is summed against a single carrier at a single frequency). the upper and lower sideband control is just a frequency range switch – a slow carrier will provide vibrato effects, while a fast freqeuncy gives ring mod effects. the whammy-style effects are achieved by varying the frequency of the carrier wave, so that the pitch of the output varies accordingly …
or not.
The Radium KingMember‘external carrier wave’ has to many syllables for you average ehx user. ‘mod’ is better.
joking. honest!
The Radium KingMemberif i were to guess, i would say it allows you to input an external signal against which the audio signal is modulated. that is, a ring mod works by outputting the summation signal of your audio signal and a carrier wave (you set the frequency and wavehape). instead of an onboard carrier wave, you can input the carrier wave via the mod input (another audio signal, drum track, whatever). the moogerfooger has the same functionality.
not that i haven’t been wrong before …
The Radium KingMemberi wonder how the fx loop works. it would be cool if it was like a moog, where you can externally process the repeats.
The Radium KingMemberok test done. i got me a moog cp-251. cool unit – produces control voltage only (the noise souce can be used for audio, however, or the lfo if you amp it). the cp-251 produces a noise source, a square wave, a sine wave, can modify the attack and decay of any of the cv waveforms, can combine waveforms, control offset and magnatude, and will latch/trigger. very cool.
i plugged it into the hog expression pedal input and … amazing. wicked trem in the volume mode, vibrato in the step bend mode, filter sweeps, cool stuff with the gliss mode – gonna be hours of fun. and, with the cp-251, you can use an expression pedal to control most aspects of the contorl voltages (trigger levels, lfo speed, etc.). next step is to get the moog lowpass filter pedal – it will make a cv output from your guitar signal (envelope follower).
sorry if this sounds like an ad for moog, but a am a happy fellow. one issue, in volume mode, some of the cv signal is audible at max sweep; i’ll have to check the voltages from the cp-251; they may be exceeding 5v at max.
The Radium KingMembersorry to ressurrect an old thread, but it’s a strange world. i was writing on another board about how the hog (and other similar guitar synths) bring us guitarist pretty close to the world of modular synthesis. the only thing missing is full adsr envelope control and lfo modulation. the thing is, most new pedals have expression pedal inputs, and adding an expression pedal input is easy stuff. so, i figured, the solution is an lfo that plugs into an expression pedal input. it’s just an automated variable resistor that will swing from 0 to 50kohms. my post is here:
http://www.offsetguitars.com/forums/index.php/topic,26031.0.html
i come sniffing around the ehx site, only to find someone has the exact same idea as i do!!!
– a pedal that plugs into an expression pedal jack and oscillates (or ‘auto-rocks’ for want of a better term).
– variable max/min setting on the auto-rock.
– has a waveshape selector knob (square, saw, sine, triangle, noise, etc.) and a rate knob. perhaps a waveshape width, skew or offset control.
– expression pedal control of the rate.
– a control voltage input that overrides the rate and waveshape controls and lets an external device (ie, an adsr envelope generator) control oscillation rate and waveshape. better yet, just have a ‘custom’ waseshape section with adsr control …
– note that, when you modulate volume you have a trem pedal, so you could use the lfo pedal to modulate the volume control of another pedal to get trem, or perhaps have an instrument in/out on the lfo pedal itself so that it doubles as a trem pedal …
– add an onboard envelope follower circuit and you could use your guitar signal as the control voltage input …
– allow the waveshapes to be output at line level and you have a signal generator also …i hadn’t thought of a step sequencer, but that is an amazing idea that really comples the circle with respect to guitar-based modular systhesis, especially when used with the octave bend setting. otherwise, with a cv input you could use any step sequencer.
as stated, such a pedal would be a great hog accessory, but versitile to work on it’s own or with any other pedal with an expression pedal input (even moogfooders …).
worst case scenario, you could jury-rig any trem pedal. i presume they just vary the resistance to ground (probably swing from 0 to 10 Mohms). put a 50kohm resistor in parallel with the pedal (ie, between the input and ground) and your resistance will swing from 0 to 50kohms; the same as an expression pedal. plug that into the expression pedal input of whatever and it should auto-whatever. not having a trem pedal i can’t confirm, however.
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