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PCM encoding is the conversion of an analog signal to digital form.īit depth truncation is bit depth reducing via removing of one or more bits. PCM analog-digital converter, quantizationĪnalog-digital converter (ADC) is a device, that periodically measure analog signal voltage and send the measured values as numbers (in digital form) to PCM digital audio output.
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These values may be converted back to the audio signal via digital-to-analog converter device. Special device - analog-to-digital converter - rapidly measure momentary values of the audio signal (its voltage). Lossy is compression or storage audio with the losses.Īudio file is file that contains audio (including musical) information.Īudio signal in musical system (amplifier, AV-receirer, etc.) is altering voltage same to acoustical waveform changing. Lossless is compression or storage audio without sound quality losses. It's analog audio output.īitstream is throughput volume in bit per second (kbit per second, kbps). Audio output may transmit signal in analog form. Transmit audio (in digital or analog form between devices).Īudio interface is part of computer, AV-receiver, TV, DAC, DAP (digital audio player) and others.ĭAC is digital to analog converter (kind of audio interface).Īudio output is connector, audio data transmition protocol and hardware, included to an audio interface, to transmit audio data to other device. Read more.Ĭonvert analog to digital signal and/or back Sometimes, size compressed audio is called as bitstream. Throughput limitation of communication channels (or audio interfaces).Ĭompression may be lossless or cause sound quality losses. From design point of view, digital audio technologies allow to achieve lower distortions, than analog ones.Īnd other) contains musical signal in this PCM format.Īudio data may be size compressed to solve issue of: Main advantage of discrete values, is ability to transmit/store with control of a errors and technical opportunity to recover it (when special coding are applied). So, the signal should be represented as discrete values (samples), that may be stored into computer memory.īefore listening, these discrete values should be transformed back to continuous signal. The point is computer can't store continuous things like analog audio signal.