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Digital Recorders are used to record conferences, interviews and lectures. They are able to capture audio signals in an uncompressed pulse code modulation (PCM) format. You can purchase one based on the recording format and medium.

An analog-to-digital converter, commonly known as ADC, is required in all digital systems. ADC is the core of digital recorders. It is used to transform analog signals into digital information before it can be processed. For this, the signals must be sampled at successive time intervals. Later, the sample value is converted to a binary number that corresponds to the amplitude of the waveform. The output is defined in a sequence of digital words. Each word is specified in a 16-bit mode. Accuracy of the digital representation is determined by its bit depth and sample rate. Most of the modern analog to digital converters is able to achieve a sample rate of 96 kHz with 24-bit audio data. These modern converters are capable of producing an accurate signal and a negligible amount of quantization noise. After the signals have been processed the sample value is stored on the storage device.

Some of the different types of digital recorders available are Installation Solid State, Portable Solid State, CDR/CD combo decks and Digital CDR Portables.

Installation Solid State recorders are more flexible and capable of holding more data.

Portable Solid State recorders can work for a long time on four AA batteries. CDR/CD combo decks provide a higher degree of playback compatibility. One of the important advantages of digital CDR portables is that it can record to blank CDs directly.

Common features of digital recorders include longer recording time, less noise, finer sound, suitable folder options, inexpensive and wide array of choices. When purchasing digital recorders, keep in mind the following options: the cost of the recorder, the quality of the audio, record time portability and reliability.