JDT Engineering Product development · Software · Electronics
Howler MK2 - Recorder + Streamer
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Howler MK2 - Recorder + Streamer

2026-04-01 audio hardware portable livestreaming usb audio product development embedded systems

The Howler MK2 is the latest generation of the Howler, a compact, rugged recorder and livestreamer built for DJs, musicians and performers. It plugs inline between a mixer or controller and the sound system, and captures a set in studio quality while simultaneously streaming it live - no laptop required.

Howler Audio is a separate company: a spin-off founded by JDT's founders together with Tim Janssen, an industrial designer and a friend of JDT founder Jim from their time studying together at TU Delft.

DJ mixer or controller Howler MK2 record + stream engineered by JDT all three at once Record 24-bit WAV → microSD Stream live to phone / tablet Thru to speakers / amp
A single pocket-sized box: the MK2 records the set in 24-bit studio quality to microSD, live-streams it to a connected phone or tablet, and passes the audio through to the sound system — all at the same time.

What JDT Engineering built

JDT Engineering is responsible for the full electronics and embedded development of the Howler, carried through to this second-generation MK2:

  • Custom audio-path electronics - a clean, low-noise capture and monitoring path with balanced RCA inputs, a THRU output to feed the sound system, and high-quality analog-to-digital conversion
  • Embedded firmware - recording engine (lossless WAV and MP3), the USB audio-interface mode, level metering and battery management
  • USB-C power and connectivity - fast charging and a USB audio interface for streaming and screen-recording straight from a phone, tablet or computer
  • Rugged, compact hardware - a pocket-sized aluminium enclosure engineered for life on the road
  • Design-for-manufacture and production - refined across generations for reliable, repeatable volume production

Key features

  • Studio-quality recording - lossless 24-bit / 48 kHz .WAV or 320 kbps .MP3 straight to a microSD card
  • Simultaneous livestreaming - stream a set in high-quality audio to a connected phone or tablet while it records
  • USB audio interface - doubles as an interface for capturing high-quality sound in video content ("Boiler Room"-style sets)
  • THRU output - passes audio on to the mixer's amplifier or speakers without interrupting the signal
  • LED level metering - keeps recording levels consistent and clip-free
  • Up to 24 hours of battery life with USB-C fast charging
  • Rugged aluminium casing - built to be gigged with

Learn more

Explore the current Howler at howler-audio.com. See also the original Howler Recorder that started the brand.

Watch

Video: Howler Audio (via YouTube)

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