Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Related Manuals for APOLLO VIEW RABBIT HOLE
Summary of Contents for APOLLO VIEW RABBIT HOLE
- Page 1 RABBIT HOLE...
- Page 2 (Note: Output Gain is an attenuverter, the minimum Output signal is achieved by setting the knob to the 12 o’clock position) Nominal Eurorack audio levels are 10Vpp. Rabbit Hole can produce peak-to-peak voltage 2.4 times greater than standard Eurorack audio levels. This could potentially damage your speakers and ears.
-
Page 3: Table Of Contents
CURIOUSER ..............................12 DESIGN ................................12 CURIOUSER SWITCHES ............................. 12 INSTALLATION CURIOIUSER ......................... 13 POWER ................................13 TRIMMERS ............................... 13 CONNECTING CURIOUSER TO RABBIT HOLE ....................14 PATCH IDEAS ............................... 15 SPECIAL THANKS Thomaas Banks Thomass Banks Ben Wilson DivKid... -
Page 4: Limited Warranty
Limited Warranty Apollo View Modular Ltd warrants this product to be free from defects in materials or construction for a period of one year from the date of purchase (proof of purchase/invoice required). This warranty does not cover any damage caused by misuse of the product, or any unauthorised modification of the product. -
Page 5: Introduction
On this journey of experimentation and discovery of tube circuitry and different tube characters, I truly fell down a Rabbit Hole. The module took on a life of its own, revealing more inherent features, namely sub-harmonic generation and self-oscillation. -
Page 6: Block Diagram
Block Diagram (GAIN CV) CV A Vintage IN A Tube CV Tone CV B (GAIN CV) 2 Pole Drive High Pass Filter Vintage Cross- Drive Tube IN B fader 2 Pole Low Pass Filter Tone ( GAIN CV) CV C (GAIN CV) CV Mix RH/Out... -
Page 7: Installation Rabbit Hole
Installation Rabbit Hole POWER Rabbit Hole is supplied with a 10-pin power cable already placed in the keyed 10-pin shrouded socket. Should the power cable become disconnected, simply reconnect into the shrouded socket using gentle pressure, ensuring correct alignment of the ‘key and lock’ the red stripe should be to the left when looking at the back of the module. -
Page 8: Knobs
Out – Attenuverter for more flexibility. This is perfect when using Rabbit Hole as a drum voice mixer and plan to mix with a bassline. The phase of Rabbit Hole’s output can be flipped to fix kick/bass phase issues. Additionally, this has an effect on the timbre when using the FB feedback circuit. -
Page 9: Cv Control
FB – Feedback Switch. Changes the timbre/character of the signal and should be used in tandem with the FB knob when engaged can cause sub-harmonics. FB must be switched on when Rabbit Hole is used as a VCO. OWTH – Off With Their Heads. This engages the LED Diode Clipping Circuit and hard-clips... -
Page 10: Rabbit Hole Functionality
Rabbit Hole Functionality EXPERIMENTATION The best way to achieve results with Rabbit Hole is through experimentation. That said, for specific results, the following approaches can be taken. WARMING To warm a signal, Drive should be at a minimum. Gain, Tube & Mix knobs to taste. Using this technique can bring warmth and phatness to any sound but is particularly useful for drums. -
Page 11: Trimmers
TRIMMERS The two trimmers on the back PCB control the centre point for the crossfade for both Mix & Tone; these have been ‘Factory Set’ but can be tweaked to adjust the crossfade point if desired. These are 25 turn Bourns trimmers; making adjustments will change the centre point for the crossfade away from the knob’s initial 12 o’clock position. -
Page 12: Curiouser
Rabbit Hole; see ‘3 Oscillator Synth Voice With Tone Animation’ in Patch Ideas. CURIOUSER SWITCHES When the switch is in the Up position, the signal is fed to the mixer on Rabbit Hole. When the switch is Down, the signal is fed to the direct Out on Curiouser. -
Page 13: Installation Curioiuser
Installation Curioiuser POWER Curiouser is supplied with a 10-pin power cable already positioned in the keyed 10-pin shrouded socket. Should the power cable become disconnected, simply reconnect into the shrouded socket using gentle pressure, ensuring correct alignment of the ‘key and lock’. The Shrouded pin header is on the inside of the rear PCB panel. -
Page 14: Connecting Curiouser To Rabbit Hole
CONNECTING CURIOUSER TO RABBIT HOLE Curiouser and Rabbit Hole both have two sets of 2 x 3 connecting pins. This is so multiple Curiouser modules can be daisy-chained into one Rabbit Hole, and the pin’s positions provide flexibility to choose which side of Rabbit Hole to place Curiouser module(s). The only important thing is the orientation of the cable. -
Page 15: Patch Ideas
Route drum mix to inputs of Rabbit Hole and Curiouser. Ensure RH/Out switches are UP to send the audio to Rabbit Hole. Adjust the Gain controls to get the mix you desire. Set the Tune bias high and a moderate amount of Drive. Adjust the Tone and Mix controls to suit. - Page 16 Exploring further, try experimenting with the L8 and FB. Note: Hi-hats and cymbals don’t sound great with heavy distortion. It is best to mix hi- hats/cymbals to the drum mix after Rabbit Hole has processed the other voices.
- Page 17 Warm Drum Mix with Accents This patch extends on the Warm Drum Mix Patch to include accents. The example here uses the snare, but you could send accents to any or all of the inputs as each channel has its own VCA.
- Page 18 Sidechained Bassline In this patch, we take advantage of the CV attenuverters. A warm drum mix has been achieved. A bassline is patched into an input on Curiouser. The trigger signal from the kick drum is used to generate an AD envelope using other modules. This AD envelope is then sent to the CV input for the basslines Gain.
- Page 19 When the AD accent is present, each channel's Gain will increase, adding more character to the mix. Note: this normalling could be utilised with all the Gains turned completely down and ADSR envelope patched to CV A to control the whole Rabbit Hole & Curiouser system as an end of voice VCA.
- Page 20 Curiouser channel as the end of voice VCA. Therefore, we patch the Out of Rabbit Hole to the In of the bottom channel of Curiouser, which is being used independently of Rabbit Hole; notice the RH/Out switch is in the DOWN position.
- Page 21 Credit for this patch goes to DivKid. Here we have an arpeggio patched into In A of Rabbit Hole and a drone into In B. The attenuverters for the CV for A & B are opposing A in positive (clockwise) and B is negative (anticlockwise).
- Page 22 Credit for this patch goes to DivKid. The drum mix audio is split, it is patched to the In A of Rabbit Hole, the drum audio signal is also passed to an envelope follower using another module and the resulting CV signal is patched to CV A.
- Page 23 This is the inverse of the compression patch. The drum mix audio is split, it is patched to the In A of Rabbit Hole, the drum audio signal is also passed to an envelope follower using another module, and the resulting CV signal is patched to CV A. CV A’s attenuverter is in the positive (clockwise) position and scale back from its maximum setting.
- Page 24 Playing with the Gain of A will adjust the interval of the subharmonic. It is possible to get Rabbit Hole to track 1 octave below the incoming audio signal. CV signals can be sent to CV A to ‘play’ these intervals. With Mix set in the middle, you get a blend of the incoming signal and subharmonic;...
- Page 25 Wonky VCO Every tube is different, so setting this up will be slightly different on each module. All knobs affect the pitch, so all can be used to tune the pitch of the self-oscillation. Start with the above settings. Use a tuner and tune to an appropriate note. Send a 1V CV signal to CV Tone.
- Page 26 Wavefolding can be achieved with high Drive settings. The best wave to observe this is with an oscilloscope to visualise the Out of Rabbit Hole. Increasing Gain A will increase the amount of asymmetrical wavefolding. In this example, Gain A has been reduced slightly so that the wavefolding can be modulated with an envelope patched to CV A.
- Page 27 Audio Rate Amplitude Modulation Patch an oscillator into IN A, and adjust Gain A to its midpoint. An audio rate oscillator (modulator) is patched into CV A; this will amplitude modulate Osc 1 (carrier), multiplying the signals together so both pitches can be heard. Try sending the same 1V / Oct CV to both oscillators.
- Page 28 CV attenuverter is in the positive (clockwise) position. The accent envelope is patched to the CV In, and the RH/Out switch is DOWN. Then this output is patched to the CV A input of Rabbit Hole, and the CV attenuverter is in the positive (clockwise) position.
- Page 29 Audio Rate Modulating Mix / Tone You can have fun with audio rate modulating the Mix, as in this example. Exploring further, try audio rate modulating Tone or Mix & Tone together. Experiment freely to find unique tones.
- Page 30 Exploring further, invert the polarity of Out; this inverts the signal that is fed to the feedback path and creates a different timbre with much more frazzle. Don’t get too lost down the Rabbit Hole…...
Need help?
Do you have a question about the RABBIT HOLE and is the answer not in the manual?
Questions and answers