Specifications

Bypass: Electronic switching with FET-input op amp bypass buffer

Input impedance @ 1Khz: 1MΩ

Output impedance @ 1Khz: <1kΩ

Power: 9VDC, 2.1mm center negative barrel. The current draw is 60mA. (Note: earlier units draw up to 200mA.)

We recommend a regulated, isolated power supply rated for 100mA minimum. The DC input is protected against reverse polarity and over-voltage up to 24V. Our pedals do not accept batteries.

Hypersleep

$399

Hypersleep production was suspended indefinitely after the Fall 2021 batch due to the inavailability of new old stock MN3011 BBDs. This page is retained for archival purposes.

The Electronic Audio Experiments Hypersleep is a solid-state analog reverberator. It evokes the immediate acoustic reflections of metal and tile, with a gritty timbre and a ringing, fluttering decay—forgoing epic atmospherics in favor of liminality. 

At the heart of the Hypersleep is the unusual and obsolete MN3011 bucket brigade device. Unlike other BBDs with one input and one output, the MN3011 uses an array of staggered delay outputs to produce a smeared-out echo. Feeding this echo back upon itself produces a reverberant texture. The reverb length can be modulated via the onboard LFO for atypical chorus and vibrato effects, or the haunting sound of a room changing size in real time. As always, careful signal conditioning ensures that Hypersleep is friendly to any instrument or line level signal source.  

Controls

  • Level: overall effect level, gracefully overloads at higher settings

  • Space: delay time of the BBD, simultaneously controlling six taps on a single delay line

  • Mix: blend of clean and effected signals, from full dry to full wet

  • Feedback: increases the decay time of the reverb; will self-oscillate at extreme settings

  • Rate: modulation rate, from imperceptibly slow to nearly audio rates

  • Depth: modulation depth, from subtle vibrato to warped pitch bending

Changelog

Version 2 (Fall 2021)

  • Updated filter scheme for improved bandwidth and clock suppression

  • Minor changes to feedback, for a less “boomy” low end response

  • Optimized power supply for reduced current draw and background noise

  • Bypass relay replaced with silent electronic switch

Version 1 (2020)

  • Original release

Hypersleep V1 Retrofit Mod

For Fall 2021 we have upgraded the Hypersleep to Version 2, with new filtering plus a few improvements to the power supply and bypass switching. If you own a Hypersleep V1, we can upgrade your filters to the V2 spec. This will not make your unit identical to Version 2, but it will confer an overall brighter sound which makes the reverberation more present. For more information about the differences, see the Blog.

If you have an older unit and wish to have the modification performed, please contact us.