The Zoom R4 is a 4-track portable multi-track recorder that lives in the same conceptual space as the classic cassette portastudios of the 1980s — record a layer, bounce it, record more — except it writes 32-bit float WAV at 48 kHz to a microSD card and runs on AA batteries or USB-C bus power. For songwriters, mobile musicians, and home recordists who want to capture a complete demo without booting a laptop, the R4 is a hardware-first sketch pad with two XLR/TRS combo inputs, a built-in stereo microphone, onboard effects, and 80+ preloaded drum patterns. Press record. Layer the parts. Bounce and keep going. Move the card to a laptop when the song is done.
Traditional digital audio recorders ask the user to set input gain before pressing record. Get it wrong and a loud chorus clips, or a quiet verse vanishes into the noise floor. The R4's 32-bit float format captures approximately 1500 dB of dynamic range in a single take — every level is recoverable in post. A vocal scratch take that started at conversational volume and built into a yell prints clean. An accidental finger snap during a quiet acoustic pass pulls back without raising hiss. The result is a workflow where the songwriter focuses on the performance and the gain-staging gets handled later, on the laptop, where there is space to think about it.
Input A and Input B accept any combination of XLR mic and TRS line/instrument cable, with switchable +48 V phantom power per channel for condenser mics. Plug a dynamic vocal mic into A and a DI'd bass into B; switch to a stereo pair of condensers on a folk gig the next night; track an acoustic guitar through the built-in onboard microphone while the XLR inputs sit idle. Input A also runs Zoom's onboard effects engine — amp simulations, delays, distortion, compression — for electric guitar and shaped vocal tones tracked direct. Per-track effects (3-band EQ, pan, echo, reverb) sit on every track for mixing without a DAW.
Four physical tracks is enough for vocals, guitar, bass, and a drum pattern. To layer more, bounce: combine the four tracks into a stereo pair on tracks 3 and 4, then re-open tracks 1 and 2 for new overdubs. Repeat as needed. The R4 preserves every original take on the microSD card even after a bounce — pull an early vocal pass back into the mix days later if the remix needs it. This is the portastudio bounce workflow without the analog generation loss. A four-track ceiling becomes effectively unlimited.
The R4 ships with 80+ preloaded drum patterns spanning rock, hip hop, funk, metal, and more, plus a configurable metronome. Songwriters write to rhythm directly: select a pattern, set the tempo, hit record. The drum part fills track 4 while vocals, guitar, and bass go onto tracks 1 through 3. For demos that need to communicate the groove before a producer steps in, this is faster than programming a beat in a DAW. The patterns are tempo-locked and the metronome is independently configurable.
USB-C does triple duty on the R4: class-compliant 2-in/2-out audio interface for Mac, Windows, iOS, and Android DAWs (no drivers required); microSD file transfer for moving sessions to a laptop; and bus power for unlimited tracking time when an outlet is nearby. Off-grid, 4 AA batteries deliver about 7 hours alkaline, 6 hours NiMH, or 14 hours lithium. microSDHC cards 4 GB to 32 GB and microSDXC cards 64 GB to 1 TB are supported — thousands of takes per card, popped out for backup or laptop transfer. The 10.1 oz chassis fits a guitar case pocket and the 2-inch color LCD shows per-track levels and effect status at a glance.
Songwriters who want a hardware sketchpad they can pick up and record into without booting a computer. Touring musicians capturing demo ideas in hotel rooms, on tour buses, and at soundchecks. Home recordists who would rather lay a four-track demo down on a focused device than open a 24-track project file for a 90-second idea. Mobile producers using the USB-C audio interface to feed laptop sessions on the road. Acoustic duos and field recordists running stereo condensers through phantom power. Anyone who has lost a great take to a clipped peak — 32-bit float ends that.