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The PCM-D1 Portable Linear PCM Recorder takes mobile recording beyond the boundaries of typical field recording, making it the ideal choice for capturing live musical or theatrical performances, for recording sound effects, or for journalists in the field. With built-in, highly sensitive, electret condenser microphones; a circuit design that processes stereo sound with virtually no extraneous noise; and 96 kHz 24-bit recording quality, this recorder is capable of capturing even the most subtle performance nuances. Convenience features such as a 4 GB internal Flash Memory, a slot for Memory Stick PRO™ (High Speed) storage media, a USB port, four AA size nickel metal hydride rechargeable batteries, and a battery charger make this unit super-equipped for field recording. Free of drive mechanisms, this lightweight, portable, and rugged recorder is audio refined – and cool redefined.
96 kHz-24 bit, virtually noise-free, recording quality
Built-in, X-Y configuration electret condenser microphones for superb stereo sound
4GB internal Flash Memory, free of drive mechanisms
Slot for removable Memory Stick PRO (High Speed) storage
Built-in USB 2.0 port, compatible with Macintosh® and Windows®/PC operating systems
Four rechargeable nickel metal hydride AA batteries (battery charger included)
Rugged titanium body with portable, lightweight design
FEATURES AND BENEFITS Built-in Electret Condenser Microphones
The PCM-D1's electret condenser microphones have extraordinarily high sensitivity and low noise characteristics. All microphone casing parts fit together nearly seamlessly and are adjusted with 100-micron level precision. With a frequency response of nearly 30 kHz, the microphones are positioned using an X-Y pattern and then angled toward each other with the left and right diaphragms close together, covering a wide sound range with reduced phase shifts. The result is rich audio with a natural sounding stereo image, good depth, and perspective.
Superb Audio Signal Path
The microphone amplifier provided for each channel is the Analog Devices, Inc. AD797, which boasts ultra-low noise and distortion. A variable gain circuit is adopted for amplitude control, which enhances the actual signal-to-noise ratio. The line amplifier provided for each channel is the Analog Devices AD8672. Analog and digital circuits are mounted on separate circuit boards and also separately powered to help prevent interference between circuit blocks. The analog circuit achieves superb linearity so that the recorded sound is output faithfully.
Outstanding Construction Quality
The circuitry of the PCM-D1 recorder is protected by a body made of 1 mm thick, pure titanium and covered with nitrate titanium, scratchresistant coating – resulting in a finished titanium surface approximately ten times as hard as that of alumite treated aluminum. In addition, a distinctive arch-shaped polished stainless steel frame is provided to protect the microphones from impact damage. This rugged exterior protects the PCM-D1's circuits and microphones and enhances the high sonic quality of the recorder.
Simple Uploading to Computer
The PCM-D1 recorder conforms to the USB 2.0 Mass Storage Device standard. Because the recorder's native recording file format is .WAV, recordings can be rapidly uploaded to a computer and used in conjunction with most common audio production software.
High Quality Signal Processing
The PCM-D1 recorder offers comprehensive signal processing features for location recording including a unique limiter function, a 200 Hz high pass filter and SBM (Super Bit Mapping) noise shaping. The digital limiter uses an independent audio buffer that contains audio 20dB lower then the audio processed in the normal recording signal path. With the PCM-D1 limiter enabled, when a loud sound suddenly occurs during recording, the over level part of the sound is automatically set within the range of the maximum input level (from the alternative -20dB buffer) in order to help prevent distortion. While this limiter function won't compensate for clipping of audio that is suddenly in excess of 20 dB, the sonic purity of the recording is fully maintained without the need to apply conventional limiter signal processing techniques. With the High Pass Filter enabled, audio below 200 Hz is filtered out and not recorded. This function can be used to reduce noise caused by external sources such as wind, the flow of air-conditioning equipment, etc. With the SBM function enabled (optionally used for 16-bit recording modes), Super Bit Mapping significantly increases the dynamic range acoustically by reducing noise that is particularly easy to hear within the human audible band. To improve the audio quality when converting 20-bit data into 16-bit, the top bits of information within the lower data (usually discarded when recording in 16-bit mode) are integrated into the 16-bit data track by shifting audible noise up into an inaudible higher frequency range.
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