expert-sleepers/es-9

ES-9

16-in/16-out USB audio interface with DC-coupled inputs and outputs for audio and CV, featuring 14 analogue inputs, 8 analogue outputs, balanced 1/4" main outputs, headphone output, S/PDIF I/O, internal 8x8 crosspoint mixer, and optional MIDI I/O via breakout.619

Capabilities 3

CV Interfacecv-interface: 8 DC-coupled 3.5mm outputs allow DAW-to-modular CV control via Silent Way, CV Tools, Bitwig, or Max/MSP.619
DC-Coupled I/Odc-coupled-io: 14 analogue inputs and 8 analogue outputs are DC-coupled, supporting ±10V CV signals for V/oct and modulation routing alongside audio.619
USB Audio Interfaceusb-audio-interface: 16-in/16-out class-compliant USB 2.0 audio interface at up to 96kHz/24-bit; no driver needed on macOS/iOS, Windows drivers provided.619

Jacks 27 — 15 in / 12 out

Name	Signal	Voltage	Description
Inputs (15)
Analogue Input 1	mixed	-10V to 10V	619
Analogue Input 10	mixed	-10V to 10V	619
Analogue Input 11	mixed	-10V to 10V	619
Analogue Input 12	mixed	-10V to 10V	619
Analogue Input 13	mixed	-10V to 10V	619
Analogue Input 14	mixed	-10V to 10V	619
Analogue Input 2	mixed	-10V to 10V	619
Analogue Input 3	mixed	-10V to 10V	619
Analogue Input 4	mixed	-10V to 10V	619
Analogue Input 5	mixed	-10V to 10V	619
Analogue Input 6	mixed	-10V to 10V	619
Analogue Input 7	mixed	-10V to 10V	619
Analogue Input 8	mixed	-10V to 10V	619
Analogue Input 9	mixed	-10V to 10V	619
S/PDIF In	audio	—	Optical TOSlink input carrying S/PDIF digital audio.619
Outputs (12)
Analogue Output 1	mixed	-10V to 10V	619
Analogue Output 2	mixed	-10V to 10V	619
Analogue Output 3	mixed	-10V to 10V	619
Analogue Output 4	mixed	-10V to 10V	619
Analogue Output 5	mixed	-10V to 10V	619
Analogue Output 6	mixed	-10V to 10V	619
Analogue Output 7	mixed	-10V to 10V	619
Analogue Output 8	mixed	-10V to 10V	619
Headphone Out	audio	—	1/4" TRS stereo headphone output, DC-coupled.619
Main Out L	audio	—	1/4" TRS balanced output, AC-coupled, designed for monitor speakers or mixing desk.619
Main Out R	audio	—	1/4" TRS balanced output, AC-coupled, designed for monitor speakers or mixing desk.619
S/PDIF Out	audio	—	Optical TOSlink output carrying S/PDIF digital audio.619

Parameters 1

Name	Type	Range	Behavior
Headphone Volume	knob	—	Controls the volume of the headphone output. Also functions as a push-button: holding it for about one second toggles between the two configurations stored in flash.619

Firmware history 1 version

Version	Released	Notes
1.3	—	619

References 2

[619]
Expert Sleepers ES-9 User Manual v1.3manual
source 619 canonical ↗ archived ↗

● verified 2026-05-21
[620]
Expert Sleepers ES-9 product pageproduct_page
source 620 canonical ↗ archived ↗

● verified 2026-05-21