The Old Blood Noise Endeavors BL-13 Octave is an octave pedal with a touch of reverb, part of the maker's BL series. It is not built for the clean, instant tracking of a standard octaver. Old Blood Noise Endeavors describes it as "not a clean or quick octave pedal, but a drifting, out of sorts, grimy ambience sort of octave pedal," producing an octave up, an octave down, and a little bit of reverb12. Players looking for that kind of texture may also want to see the site's wider Octave & Pitch Pedals and Reverb Pedals pages.
The controls
The BL-13 keeps its work to a handful of controls: Volume to set overall volume, More to increasingly recirculate the octaves, Clock to affect the timing of the entire system, moving from faster octaves with a brighter sound to slower octaves with a more diffused and aliased sound, and Mix to set effect blend from 100% dry to 100% wet, all engaged by a soft-touch bypass footswitch for true bypass and minimal switch noise12.
| Control | What it does |
|---|---|
| Volume | Sets overall volume1 |
| Mix | Sets effect blend from 100% dry to 100% wet1 |
| More | Increasingly recirculates the octaves1 |
| Clock | Affects the timing of the entire system2 |
| Footswitch | Soft-touch bypass footswitch for true bypass and minimal switch noise1 |
The More knob is the depth control for the effect: as it turns up, it adds feedback, stretching out the reverb and cascading the octaves outward, in the maker's words, "into the abyss"2. Clock is the knob that sets the pedal's character. Old Blood Noise Endeavors describes it as moving "from faster octaves with a brighter sound to slower octaves with a more diffused and aliased sound," degrading the octaves and stretching out the reverb timing2. In practice, Clock is where the BL-13 shifts from a usable octave voice toward the degraded, ambient side of its range.
Power
The BL-13 runs on a 9V DC center negative supply with a 2.1mm barrel jack, and needs a supply capable of 110mA. The supply is not included, and the pedal takes no battery1. At 110mA it is well within reach of most isolated pedalboard supplies, but a low-current daisy-chain output may not be.
No battery option: the BL-13 requires an external 9V DC center negative 2.1mm supply rated for at least 110mA1.
Colorways and availability
The BL-13 has been offered in Retirement Black and Standard color options1, with enclosure art by Brandy M Patterson1. As of the maker's product page in October 2026, the pedal is listed as Sold Out1.
Videos
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Will Mckelvey
THE PEDAL COLLABORATIVE
Questions
Is the BL-13 Octave true bypass?
Yes. The BL-13 uses a soft-touch bypass footswitch that Old Blood Noise Endeavors describes as providing true bypass and minimal switch noise. Because the switch is soft-touch rather than a mechanical click switch, it engages and disengages the effect quietly, which players with loud amps or clean signal paths tend to appreciate.
Does the BL-13 Octave take a battery?
No. The pedal requires a 9V DC center negative 2.1mm jack power supply capable of 110mA, and no battery is included. A standard isolated pedal supply with enough current headroom will run it; a daisy-chain supply shared with several pedals may not.
What does the Clock knob do on the BL-13?
Clock affects the timing of the entire system. Turned one way it gives faster octaves with a brighter sound; turned the other it slows the octaves down into a more diffused and aliased sound, degrading the octaves and stretching out the reverb timing. It is the knob that shapes the pedal's character most.
What power supply does the BL-13 Octave need?
A 9V DC center negative supply with a 2.1mm barrel jack, capable of at least 110mA. The supply is not included with the pedal, and no battery option is offered.
Is the BL-13 Octave still in production?
As of the maker's product page in October 2026, the BL-13 Octave is listed as Sold Out. Old Blood Noise Endeavors has not announced whether it will return, so availability depends on restocks or the secondhand market.
Sources (2)
- Old Blood Noise Endeavors, Old Blood Noise Endeavors
- Old Blood Noise Endeavors, Old Blood Noise Endeavors
