Higher bit-depth samples offer the potential for a higher signal-to-noise ratio. In addition, ASIO supports 24-bit samples, unlike Windows NT 5.x MME and DirectSound which truncate 24-bit samples to the upper 16 bits, whereas Windows NT 6.x mixer provides 32-bit floating point output. Unlike KMixer, an unmixed ASIO output is "bit identical" or "bit perfect" that is, the bits sent to or received from the audio interface are identical to those of the original source, thus potentially providing higher audio fidelity. Its main strength lies in its method of bypassing the inherently high latency and poor-quality mixing and sample rate conversion of Windows NT 5.x audio mixing kernels (KMixer), allowing direct, high speed communication with audio hardware. In this way ASIO offers a relatively simple way of accessing multiple audio inputs and outputs independently. Each layer that is bypassed means a reduction in latency (the delay between an application sending audio information and it being reproduced by the sound card, or input signals from the sound card being available to the application).
ASIO bypasses the normal audio path from a user application through layers of intermediary Windows operating system software so that an application connects directly to the sound card hardware.
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