GMS-1350 Polywav™ MINI

Plays 16bit Stereo WAV files from Micro SD Card

The GMS-1350 Polywav™ MINI is a multitrack polyphonic wav file player. The unit can be controlled from USB MIDI or DIN MIDI. Files are played from a microSD card inserted in a slot in the front panel. The stereo wav file playback sample rate is 44.1 KHz with a sample resolution of 16 bits. As many as 4 stereo wav files can play simultaneously with their relative levels controlled by MIDI velocity commands. 

Two operational modes are provided, RUN mode that allows the sample player to perform playback operations and EDIT mode that allows the user the ability to load file banks of related samples and to set other playback parameters that are used during the RUN mode. A 1 inch OLED display, pushbuttons and a data entry encoder serve as the user interface. 

The module output is provided as a stereo left and right channel output. The output level can be set for -10dB for use with an external mixer or +4dB for output to other synthesizer modules that require higher level waveforms.



Technical Specifications

Mixer Section


Channel Gain Control
100K Linear Taper
-A Version 100K Audio Taper

Output Gain Control Range
-200% to +200%

Output Offset Range
-5 V to +5 V

Processor Section

Output Gain Control Range
-200% to +200%

Output Offset Range
-5 V to +5 V

Typical Input Impedance
100K Ohms

Typical Output Impedance
1K Ohms (short circuit protection)

Module Power
+15 Volts 25 mA.
-15 Volts 25 mA.

Module Size
Panel height - 8.75 inches (222 mm)
Panel width - 4.25 inches (108 mm)
Depth (behind panel) 2.1 inches (53 mm)



We produce electronic synthesizer modules in the two most popular formats, MU (Moog compatible 5U) and EU (Eurorack compatible 3U). A wide range of voltage controlled modules including oscillators, amplifiers, mixers, envelope generators, special effects units, wave generators, filters, power systems and cases allow users complete freedom to configure any desired electronic music instrument.


Grove Audio builds microphones, preamplifiers, equalizers, compressors and other professional audio equipment for performance and studio use. We build units in popular formats such as 19 inch rack mount and 500 series 3U modules. We can also produce custom designs on request. Contact us for a consultation.


You can explore all of our products, download spec sheets, and purchase our products in the Grove Audio Synth Store. You can also learn about our periodic specials and new product introductions. Click the button below to go directly to the store.

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Grove Audio has been manufacturing professional recording and modularized electronics for musicians and performers since 1995.