SIGNAL PROCESSING TOOLKIT
Audirvāna provides you with a digital signal processing toolkit that opens up numerous possibilities. You can adjust, personalize and optimize your listening experience according to both your desires and your system.
Internal digital volume control
A solution ready to take over
Most devices have a volume control, either analog or – increasingly – digital. When this setting is controllable by Audirvāna, it is visible with the volume bar in the software, and you can adjust it thru the application.
If this is not the case, you can always adjust the volume outside of Audirvāna using directly the interface or volume knob of your device.
However, Audirvāna offers a very high quality internal digital volume control. It is disabled by default, but you can enable it in the software’s audio settings.
In this case, Audirvāna performs the attenuation calculations before sending the data stream to your device. However, it is preferable to only use one at a time. If you use the Audirvāna internal volume control, it is best to set the volume of your device to its nominal volume, i.e. the volume at which it neither attenuates nor increases (= 0 dB).
Please note that this feature is only available when your device is connected via USB. When connected via UPnP/DLNA the large buffer creates a latency incompatible with this service (time lag).
Audio Plugins integration
A custom-made performance
for inserting serial plugins into the audio processing flow
Audirvāna offers you the possibility to insert in the audio processing chain one or more (up to 4) plugins of your choice. These plugins can be AudioUnits under MacOS, or VST3 under Windows10.
This will allow you, for example, to use a multi-band equalizer in order to attenuate a resonance of your living room at a certain frequency. However, you can also insert a convolution engine capable of applying more sophisticated filters to correct the acoustics of your room and/or system.
The use of plugins – especially to modify the frequency response of your music – requires some expertise to avoid creating more nuisance than you were trying to correct in the first place.
Shift up a gear
You can oversample your audio files directly in Audirvāna before playback on your system, using one of the two built-in high-performance algorithms: SOX (SoundExchange) and R8 Brain. This can improve sound quality, sometimes quite noticeably, depending on your system’s converter and the settings you choose.
Indeed, almost all DACs today on the market operate on a very-high-frequency switching-principle with a resolution of only a few bits. They therefore systematically oversample the signal just before the actual conversion, but work with limited computing power and more or less powerful algorithms, particularly for chip-cost and latency reasons.
You can use Audirvāna to carry out this operation upstream: it will benefit from the computer’s much greater computing power, and with a high-performance algorithm. This will facilitate the DAC’s work by giving it a stream that contains more precise points at the base.
The settings associated with each algorithm are slightly different, but both will allow you to define the multiple of the sampling rate to be applied (x2, x4 etc.) as well as to fine-tune various filters, essentially to neutralize the artifacts that result from these operations.