DSM03 - Sound synthesizer Dave Smith - Free user manual and instructions

Product Type	Audio synthesizer module
Dimensions (W x D x H)	10 x 5 x 2 inches (25.4 x 12.7 x 5.1 cm)
Weight	1.2 lbs (0.54 kg)
Power Supply	9V DC, 500mA (center positive)
Main Functions	Sound generation, MIDI control, LFO modulation
Audio Outputs	1 x 1/4" TS mono output
Audio Inputs	1 x 1/4" TS external input
MIDI Connectivity	MIDI In, MIDI Out (5-pin DIN)
Controls	4 knobs, 2 buttons, 1 toggle switch
Display	None (indicator LED only)
Operating Temperature	0°C to 50°C (32°F to 122°F)
Storage Temperature	-20°C to 60°C (-4°F to 140°F)
Warranty	1 year limited warranty
Package Contents	DSM03 module, power adapter, user manual
Cleaning Instructions	Wipe with dry cloth; avoid solvents
Safety Certifications	CE, RoHS compliant
Repairability	User-serviceable: no; contact support
Country of Origin	China
Compatible Accessories	Eurorack power cables, MIDI cables
Firmware Update	Via MIDI SysEx

Frequently Asked Questions - DSM03 Dave Smith

How do I connect the DSM03 to my synthesizer?

Connect the MIDI Out of your synthesizer to the MIDI In of the DSM03 using a standard 5-pin DIN cable. Ensure both devices are powered on and set to the same MIDI channel.

What power supply does the DSM03 require?

The DSM03 requires a 9V DC power supply with a minimum of 500mA and a center-positive 2.1mm barrel connector. Using an incorrect power supply may damage the unit.

Can I use the DSM03 with a Eurorack system?

Yes, the DSM03 is compatible with Eurorack systems. You will need a Eurorack power cable (16-pin to 10-pin) and a mounting bracket if required.

How do I update the firmware on the DSM03?

Firmware updates are performed via MIDI SysEx. Download the latest firmware from the Dave Smith website and send it to the DSM03 using a MIDI interface and appropriate software.

What are the main controls on the DSM03?

The DSM03 features 4 knobs for parameter adjustment, 2 buttons for navigation, and a toggle switch for mode selection. Refer to the manual for detailed functions.

Why is there no sound from the DSM03?

First, ensure the unit is powered and the audio output is connected. Check that the volume knob is turned up and that the MIDI signal is being received (MIDI LED should blink). Also verify the output cable is functional.

Can I connect an external audio source to the DSM03?

Yes, the DSM03 has an external audio input (1/4" TS) that allows processing external signals. Use a standard instrument cable to connect.

What is the warranty period for the DSM03?

The DSM03 comes with a 1-year limited warranty covering defects in materials and workmanship. Warranty does not cover damage from misuse or unauthorized modifications.

How do I clean the DSM03?

Use a soft, dry cloth to wipe the surface. Avoid using liquids, solvents, or abrasive cleaners. Ensure the unit is unplugged before cleaning.

Where can I find spare parts for the DSM03?

Spare parts such as knobs, jacks, and power connectors can be ordered through authorized Dave Smith dealers or the official website. Contact support for assistance.

USER MANUAL DSM03 Dave Smith

Thank you for purchasing the DSM03 Feedback Module. At the heart of this module is a tuned feedback line for audio processing; a 4-pole resonant, digital low-pass filter for tone shaping; and a triggerable noise source for Karplus-Strong-type plucked string synthesis.

The DSM03 is a 10HP wide, Eurorack-format device. Interconnections are made using 3.5 mm phone jacks and allow voltage control of feedback amount, feedback tuning, low-pass filter cutoff frequency, and resonance. Attack and Decay parameters control the triggered noise envelope. The module provides one audio input, one audio output, and a trigger input for the internal noise source. The signal path of the digital filter provides full, 24-bit, 96 kHz resolution.

DSM03 Front Panel

DSM03 Circuit Diagram

About Tuned Feedback

The DSM03 Feedback Module's tuned feedback delay has a 9-octave range, which is most noticeable when it oscillates. The tuned feedback loop will track reasonably well at 1V/octave over a 3-4 octave range via control voltage (CV). Because the low-pass filter is in the feedback path, it is important to adjust the filter settings for best results. In other words, the filter settings will affect tracking accuracy. Setting the LPF FREQ knob to 12 o'clock is a good starting point. When an audio signal is passed through the input, the feedback tends to lock to frequencies of the input signal. So, a pitched audio input will result in closer feedback tracking, while non-pitched audio will give less predictable results.

Using the DSM03

The DSM03 has many uses, including as a signal processor and as a tone generator.

Signal Processing

You can create a broad variety of effects with the DSM03 by processing an audio signal though the tuned feedback path (and filtering it if desired). Experiment with the Tuning parameter to vary the effect in subtle and not-so-subtle ways.

To use the DSM03 as a signal processor:

1. Connect an audio signal to the DSM03's AUDIO INPUT jack.
2. Connect the DSM03's AUDIO OUTPUT to a mixer or other module that provides audio output.
3. Adjust the TUNING parameter manually or connect a control voltage to its voltage control input to modulate it.
4. Adjust the LPF EREQ and RESONANCE parameters manually or connect a control voltage to their voltage control inputs to apply additional processing to the sound.

Tone Generation

You can also use the DSM03 as a tone generator through its Karplus-Strong plucked string synthesis capabilities. In classic Karplus-Strong synthesis, a short excitation waveform (white noise) is generated. This excitation is output and fed back into a delay line. The output of the delay line is fed through a filter (the low-pass filter). The filter characteristics determine the harmonic structure of the decaying tone. The filtered output is mixed back into the output and fed back into the delay line.

To use the DSM03 as a tone generator:

1. Connect a control voltage signal of 1.6V or greater to the DSM03's TRIGGER IN jack.
2. Connect the DSM03's AUDIO OUTPUT to a mixer or other module that provides audio output.
3. Adjust the ATTACK and DECAY parameters to shape the envelope of the generated sound.
4. Adjust the TUNING parameter manually or connect a control voltage to its voltage control input to modulate it.
5. Adjust the LPF FREQ and RESONANCE parameters manually or connect a control voltage to their voltage control inputs to shape the harmonic content of the generated sound.

DSM03 Specifications

IN/OUT

• Feedback Amount CV: -5V to +5V
- Tuning CV: -5V to +5V
• LPF Freq CV: -10V to +10V
• Resonance CV: -5V to +5V
• Audio In: -2.5V to +2.5V
• Audio Out: -2.5V to +2.5V
• Audio Trigger In: 0 to +10V

POWER

- Internal power connector (ribbon cable included)

CURRENT DRAW (5V or 12V operation set by jumper)

Using 5V power supply:

• +5V = 200 mA
• +12V = 10mA
-12V = 20mA

Using 12V supply only:

• +12V = 210mA
-12V - 20mA

PHYSICAL SPECS

• 1.99" W x 5.06" II (50.5 mm x 128.5 mm)
• Width: 10 IIP

- Depth (measured from back of panel with power cable installed): 1.54" (39 mm)

INCLUDED

• Mounting screws
• Ribbon cable for power connection

Product Support and Warranty

Contacting Technical Support

If you are having a problem with the DSM03, contact Technical Support at [e-mail]. Please include the purchase date.

Warranty Repair

Dave Smith Instruments warrants that the DSM03 will be free from defects in materials and/or workmanship for 1 year from the date of purchase. Please register your product online at www.davesmithinstruments.com to establish the date of purchase. (This is not a requirement for warranty service, but it will help expedite the process.)

Please contact [e-mail] to determine the best course of action for getting your DSM03 repaired. For your own protection, as well as ours, please do not return any product to Dave Smith Instruments without a return authorization (RA) number. To issue an RA number, Technical Support needs:

• Your name
• Your return address
• Your email address
  • A phone number where you can be reached
  • The date of purchase and where purchased

If you need to return your DSM03 for repair, you are responsible for getting it to DSI. We highly recommend insuring it and packing in the original packaging. Damage resulting from shipping a product with insufficient packaging is not covered by warranty.