The Endless Sleeper II is an analog voiced cascading dual-delay pedal from Australian maker Beautiful Noise1. Instead of running two delays in parallel or simple series, its two delay lines cascade into each other, each contributing between 30ms and 1500ms, with the second delay's output able to return to the first21. Each delay line carries its own pitch modulation, and a Crush control at the end of the chain reduces the sample rate of the output for lo-fi, 8-bit character23.
The dry signal stays fully analog from input to output, while the wet signal passes through two digital delay chips2. Delicious Audio's Paolo De Gregorio described the result as a pedal that "can conjure up complex dreamy sonic textures"1. It is a mono pedal23.
What it does: two cascading delays with modulation and bitcrush
The core idea is the cascade. Two delay lines feed into each other, and the knob marked <<< routes the output of Delay II back into the input of Delay I, causing a third delay line and adding an additional repeat to every previous sequence of repeats21. Guitar Pedal X's Stefan Karlsson described the circuit as "built around two pitch-modulated delays cascading into each other, with the Second Delay's output returning to the first"3.
Each delay time ranges from 30ms to 1500ms2. The modulation and lo-fi circuits sit at the end of the chain1. The Glide section modulates the delay lines through an internal LFO: the maker says it adds "lush chorus, vibrato, flutter & wow, or deep waves of pitch shifting madness" depending on settings2. Delicious Audio found the Glide knobs add lush chorus and vibrato on shorter delay settings, or what they called psychotic waves of pitch-shifting madness on longer delay times1.
The Crush control reduces the sample rate of the output signal, from a soft chime at lower settings to full 8-bit fuzz at higher settings, with a sample rate range of 40kHz to 270Hz2. Delicious Audio describes it as a sample rate reducer and bit crusher giving a lo-fi character reminiscent of 8-bit gaming consoles of the '80s1.
Controls
| Control | What it does |
|---|---|
| DELAY | Wet/dry mix: balances the dry signal against the delayed signal2 |
| D.TIME | Delay time, 30ms to 1500ms per channel24 |
| FEEDBACK | Repeats, from a single slap-back to infinite repeats and chaotic oscillations2 |
| GLIDE | Modulation depth, one knob per channel in MkII1 |
| MOD RATE | Sets the rate of modulation, via two small knobs1 |
| WAVEFORMS | Selects the Glide LFO waveform per channel: Sine, Square, or Random2 |
| <<< | Routes Delay II's output back into Delay I, creating a third delay line2 |
| CRUSH | Sample rate reduction, from soft chime to full 8-bit fuzz (40kHz to 270Hz)2 |
Guitar Pedal X lists the full Delay I control set as Mix, Delay Time (30ms to 1500ms), Glide, Feedback, Mod Rate, and Glide Waveform (Sine / Square / Random), with Delay II mirroring it4.
Footswitches and oscillation
The pedal carries two footswitches: an Overload footswitch (max feedback / oscillation) and a bypass footswitch3. The maker says self-oscillation occurs by either raising the Feedback knobs or engaging the Overload footswitch2. Delicious Audio describes the Overload footswitch as momentarily maxing out both delays' feedback controls for hands-free sonic bliss1.
What reviewers said
Guitar Pedal X reviewed the Endless Sleeper II in November 2024 and concluded34:
"All-in-all a really well thought out execution of a really smart concept."
Stefan Karlsson, Guitar Pedal X3
The same site also found the design very intuitive and easy to use overall3, and in its round-up of 2024's time-based effects called it "a distinct Cascaded Ambient Dual Delay with additional modulation and bitcrushing, a fantastic shoegazer style effect"4.
The original Endless Sleeper drew a strong review from Pedal of the Day in 2019, which found it "loud but even-tempered; chaotic but controlled; unnerving but smooth; maddening but inspiring," and noted that once you crank the Feedback knobs "this thing goes on forever, creating gorgeous, booming oscillation"5.
Versions and editions
The Endless Sleeper II is an upgrade over its V1 predecessor, which the maker describes as bringing a tonne of versatility and experimentation upgrades2. Beautiful Noise updated the pedal to MkII in November 2024 and discontinued the original MkI1. The MkI was itself an analog voiced cascading digital delay pedal with two independently controlled delay lines wired in series, delay times of 30ms to 1200ms, and the same dry-analog, wet-digital split1. See the Beautiful Noise Endless Sleeper MkI page for the earlier version.
What the MkII adds over the MkI:
- Per-channel Glide knobs, new to the latest version1
- Waveform toggles per channel (Sine, Square, Random), also new1
- The <<< knob for the third cascading delay line21
- Delay time extended from 30ms to 1200ms on the MkI to 30ms to 1500ms on the MkII21
Guitar Pedal X notes the Endless Sleeper II follows Beautiful Noise's When The Sun Explodes Atmospheric Feedback Reverberator and Exploder White Noise Distortion3.
The Endless Sleeper II is mono, not stereo3, and runs on a 9V DC supply with a standard 2.1mm center negative plug drawing 90mA2, so plan power accordingly on a shared supply.
Videos
The Pedal Zone
collector//emitter
Harp Lady
Questions
Is the Endless Sleeper II true bypass?
Yes. The maker lists the bypass as True Bypass with a footswitch for effect ON/OFF. The dry signal also stays fully analog from input to output, while only the wet signal passes through the two digital delay chips.
Is the Endless Sleeper II stereo?
No. Guitar Pedal X's review describes it as a mono pedal, suited to ambient soundscapes. Players wanting stereo delay spreads would need to look at other dual-delay designs.
Is the Endless Sleeper analog or digital?
It is a hybrid. The dry signal stays fully analog from input to output, while the wet signal passes through two digital delay chips. Reviewers describe the result as analog voiced, with a lo-fi overall tone.
What does the <<< knob do on the Endless Sleeper?
It routes the output of Delay II back into the input of Delay I, creating a third delay line and adding an additional repeat to every previous sequence of repeats. This is what makes the two delays cascade rather than simply run in series.
What changed between the Endless Sleeper MkI and MkII?
The MkII gives each channel its own Glide knob, adds waveform toggles (Sine, Square, Random) per channel, adds the <<< knob, and extends delay time from the MkI's 30ms to 1200ms range to 30ms to 1500ms. The MkI is discontinued.
Can the Endless Sleeper II self-oscillate?
Yes. The maker says self-oscillation occurs by raising the Feedback knobs or engaging the Overload footswitch, which momentarily maxes out both delays' feedback controls. Pedal of the Day described the original's cranked feedback as gorgeous, booming oscillation.
Sources (5)
- Updated Pedal: Beautiful Noise Endless Sleeper II Delay, Delicious Audio, 2024-11-20
- ENDLESS SLEEPER II, Beautiful Noise Effects
- Guitar Pedal X, Guitar Pedal X, 2024-11-26
- Guitar Pedal X, Guitar Pedal X, 2024-12-20
- Beautiful Noise Effects Endless Sleeper Delay, Pedal of the Day, 2019-03-15
