ALM Stem Ripper (2025)

Eight channels of modular stem recording in 6HP—no computer, no fuss, just press record and capture the chaos.

Overview

You’re knee-deep in a patch, cables snaking everywhere, modulation spiraling into something beautiful and unstable—and you know you need to save it. Not a stereo bounce, not some half-baked mix through your audio interface, but every voice, every drum, every glitching feedback loop isolated and ready for the DAW. That’s where the ALM Stem Ripper lives: it’s the quiet workhorse that lets you stop worrying about capture and start trusting the moment. Slot one into your rack and suddenly, you’ve got an eight-track tape machine that fits in the gap between your VCOs and your filter, recording straight to microSD with no computer tether, no MIDI clock dance, no setup. Just plug, press record, and know it’s all being saved—date-stamped, multichannel, and ready to drag into your sequencer later.

It doesn’t try to be a mixer, a looper, or a synth voice. It’s a recorder, pure and focused. Eight inputs, each with 20Vpp headroom—yes, you read that right—so even the gnarliest modular peaks won’t clip unless you really push it. Each channel gets its own discrete track in a multichannel WAV file, and two additional mix tracks are baked in: a fixed stereo sum of all inputs, with levels you can tweak via internal config. That means you get both the raw stems and a rough stereo reference in one file, which is a godsend when you’re digging through last night’s sessions and can’t remember which patch made that weird metallic drone. The file structure is clean, too—WAVs stamped with the exact date and time thanks to a battery-backed real-time clock, so your archive stays organized without lifting a finger.

And it’s fast. No boot screens, no menus, no navigating folders with a tiny OLED. You plug in your SD card (a 64GB one comes included), power up, and press the big red button. Recording starts. Press it again, and it stops. That’s it. No latency, no buffering, no second-guessing whether it caught the take. For live performers, that simplicity is priceless. For patch archivists, it’s liberating. You stop thinking about the process and just play. The LED indicators give you clip warnings and record status at a glance—no need to squint at meters or parse cryptic codes. It’s designed like a tool, not a toy.

But let’s be clear: this isn’t a high-res studio recorder. It records at 16-bit/44.1kHz by default, though firmware v101 adds 48kHz and 32-bit float options—if you edit the config.ini file on the SD card. That’s a small hurdle, sure, but one that keeps the front panel clean and the workflow immediate. And while 16-bit might raise eyebrows in 2025, it’s more than enough for sketching, jamming, and even final masters if your gain staging is tight. The real advantage isn’t bit depth—it’s immediacy. You’re not losing time to setup, and you’re not leaving anything on the table because you forgot to arm tracks. Every input is always armed. Every patch is always capturable.

It pairs beautifully with ALM’s own MEGA-TANG or Jumble Henge for pre-recording mixing, but it doesn’t demand them. You can send eight separate voices straight in, or route multiple sources through a mixer and capture stems that way. The flexibility is in your patch, not in the module’s firmware. And if you’re worried about breaking your signal chain to record, there’s an optional 2HP Thru expander that passes all eight inputs through unbuffered—so you can send each signal to both the Ripper and your mixer, no stacking cables needed. It’s passive, it’s simple, and it solves a real routing headache, even if it eats a little extra space.

Specifications

Key Features

No-Compromise Signal Path, No Setup Time

The Ripper’s greatest trick is how invisible it becomes. Once installed, it’s always ready. No drivers, no USB connections, no DAW routing. The 20Vpp headroom on each input means it can handle the full dynamic range of Eurorack without fear of clipping—even hot outputs from oscillators or overdriven VCAs sail through cleanly. That’s not just a spec; it’s a design philosophy. This module assumes you’re working in a high-level environment and refuses to be the bottleneck. The LED clip indicators are responsive and accurate, lighting up well before distortion occurs, so you can adjust levels preemptively. And because it records directly to SD card with zero latency, there’s no buffer delay to throw off your timing. What you play is what gets saved—exactly.

Configurable Mix Tracks and File Management

Beyond the eight stem tracks, the Ripper writes two additional mix tracks to the WAV file: a stereo sum of all inputs, with individual channel levels set via the config.ini file on the SD card. This isn’t real-time mixing—it’s fixed at recording time—but it’s a smart compromise. You can set up a balanced stereo reference mix once, then forget it, knowing every recording will include both the raw stems and a rough mix for quick auditioning. The date-stamping feature, backed by a battery-maintained clock, ensures your recordings are automatically organized by session. No more “Jam_01_v2_final_reallyfinal.wav”—just clean, timestamped files that sort chronologically. Transfer them to your computer via SD card reader, and you’re editing in your DAW within seconds.

Expandability and Integration

The optional Thru expander (ALM050-EX1) is a small but crucial accessory. It adds a second row of unbuffered outputs that mirror the eight inputs, letting you send each signal to both the Ripper and another destination—like a mixer or effects processor—without stacking cables. It’s passive, so it doesn’t draw power, but it does require 2HP of additional space. Some users have noted that an active buffered thru would be preferable to avoid potential pops or signal degradation, but the unbuffered design keeps the expander simple and cost-effective. For those deep in the patch, this expander removes a major friction point: the fear of breaking your signal chain just to record. With it, the Ripper becomes truly transparent in your system.

Historical Context

The ALM Stem Ripper arrived in 2025 at a time when modular recording solutions were either too simple or too complex. On one side, you had standalone recorders like the Zoom ERL-6—affordable, high-fidelity, but external boxes that broke the all-in-rack ethos. On the other, you had computer-based DAWs with multiple audio interfaces, demanding precise clocking, driver management, and a level of technical patience that kills spontaneity. The Ripper splits the difference: it’s a dedicated recorder that lives in your case, powered by your modular supply, with no external dependencies. It’s not the first in-rack recorder—Half Time Modular’s 8TR was already generating buzz with higher specs—but it’s one of the first to prioritize workflow over raw numbers. ALM didn’t try to win a spec sheet war; they built a tool for people who hate interrupting their flow to hit record. In a world where modular synthesis is increasingly about performance and improvisation, that focus on immediacy matters. It’s a response to the growing demand for “set and forget” documentation tools—modules that capture the ephemeral without becoming the center of attention.

Collectibility & Value

As a 2025 release, the ALM Stem Ripper is too new to be considered vintage in the traditional sense, but it’s already carving out a niche among serious modular users. New units sell for around £300 GBP (approximately $380 USD), with the Thru expander adding another £60. Prices on the secondhand market remain close to retail, with used units typically fetching £250–£280 depending on condition and whether the expander is included. There are no known failure points at this stage—no widespread issues with SD card corruption, clock battery drain, or power instability. The module is built robustly, with a metal faceplate and high-quality jacks, and ALM’s two-year warranty offers peace of mind. The biggest risk for buyers is firmware ignorance: some users report missing the 32-bit float and 48kHz options because they don’t realize those must be enabled manually in the config.ini file. Always check that the firmware is updated to v101 or later. Also, verify the SD card works reliably—while up to 1TB is supported, some high-capacity cards have been reported to cause write errors. Stick to known brands like SanDisk or Samsung, and format the card to FAT32 before use. For collectors, the Ripper isn’t a “grail” module, but it’s a highly practical one—especially for performers, educators, or anyone building a patch library. Its value lies in utility, not rarity, and it’s likely to remain a sought-after utility module for years.

eBay Listings

ALM Busy Circuits Stem Ripper 8-Channel Recorder EURORACK NE

$375

As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.

Related Models

• ALM Stem Ripper Thru
• 4ms Ping
• ADC 27
• 2hp LPG V2
• ALM AXON-2
• AMS DMX 2000
• Marantz SD-930
• Accuphase A-60
• Accuphase AC-1
• Accuphase DP-100