Drawmer DS201 Noise Gate

The Drawmer DS201 Noise Gate is a sophisticated dual channel noise gate, which may be used as two independent channels or linked for true stereo operation. It incorporates a number of impressive features, many pioneered by Drawmer, which are invaluable to the sound engineer.

The Drawmer DS201 Noise Gate offers a number of features including variable high and lowpass filters, comprehensive envelope control, attack, hold, decay, and range. It accepts a key input which allows the gate to be triggered externally.

These features and its "user friendliness" have made the Drawmer DS201 an "industry standard" throughout the world.

Setting up noise gates can be tedious and unrewarding. For example, when attempting to separate a signal from unwanted noise or crosstalk that is relatively high in level, spurious triggering of the gate by unwanted components within the sound can be a serious problem. This can often be experienced in the studio when recording a drum kit. If a gate is used to clean up the snare drum sound it is quite likely that the nearby hi-hats will spill into the snare drum microphone and cause the gate to open. Increasing the threshold level may cure this problem, but then there is a very real danger that any quieter snare drum beats may not cause the gate to open at all and the performance can easily be ruined.

The Drawmer solution to this problem is the inclusion of two variable filters, one high-pass and one low-pass, which act upon the side-chain keying circuitry. By setting the output switch to key listen the user can hear the action of the filters and adjust them to reject high frequency spillage from the hi-hats. This now enables the gate to only open on the lower frequencies present in the snare drum.

The Drawmer pioneered the concept of frequency conscious gating, and the Drawmer DS201 was the first noise gate to include this feature.

The very fast attack of the Drawmer DS201 means that it can open in a matter of micro seconds, thus preserving the natural attack of whatever sound is being gated and the comprehensive envelope controls mean that the gain can be changed at whatever rate best suits the material being processed. With vocals for example, a fairly fast attack is needed so as not to clip the leading consonants but a slower release time will prevent the end of words being clipped off and will also fade out any noise gradually rather than cutting it off abruptly. This latter point is very important as the human ear is far more sensitive to rapidly changing noise levels than to a constant low level noise.

Another important role played by the gate is in the reshaping of existing sounds. An example of this might involve a simple sampling delay line used to store a sound to be re-triggered later and added to a mix. A gate can be used to impart a slower attack or faster decay to the sound and careful setting of the decay envelope can effectively hide any noise present at the end of the sample. When using a sampler or drum machine the gate can be considered a triggered envelope shaper, and the wide range allowed by the envelope controls make the Drawmer DS201 ideal for this application.

The Drawmer DS201 can be switched to accept a key input, which allows the gate to be triggered externally. An example of this would be to use a snare drum signal to open the gate on a separate ambient microphone to create a natural alternative to gated reverb.

Each channel can be individually switched from Gating to Ducking for 'voice over' applications or the removal of 'clicks' and 'pops'.

Drawmer DS201 Noise Gate Features

• Variable high pass and low pass filters for "frequency conscious" gating
• Comprehensive envelope control, attack, hold, decay, and range
• Key input for external triggering
• "Key Listen" facility
• Extremely fast attack time, to preserve the natural attack of the sound
• Balanced inputs and outputs
• Stereo linkable
• Can be used for "Gating" or "Ducking"
• High audio specification

Drawmer DS201 Noise Gate Specifications

• Input Impedance: 20K Ohm
• Maximum Input Level: +17dB
• Output Impedance: 50 Ohm Balanced, 100 Ohm Unbalanced
• Maximum Output Level: +17dB
• Bandwidth: 23Hz to 31KHz - 1dB
• Distortion (0dB Input): 100Hz; < 0.025%, 1KHz; < 0.025%, 10KHz; < 0.025%
• Power Requirements: 93-125 Volt or 185-250 Volt at 50-60Hz, 9 Watts
• Fuse Rating: 32mA for 230 Volt, 63mA for 115 Volt
• Fuse Type: 20mm x 5mm, Class 3 Time delay, 250 Volt Working, Conforming to IEC127-2
• Dimensions: (W x H x D) 482mm x 44mm x 200mm
• Weight: (Including packaging) 3.4 Kg

Drawmer DS201 Noise Gate Includes

• Drawmer DS201 Noise Gate
• Power Cord
• User Manual
• 1 Year Warranty