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Weird ASIO behaviour?

daftcombo

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Feb 5, 2019
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Hi,

I have the lastest drivers for my Focusrite Scarlett 2i4 2nd Gen. In Foobar2000, I have the ASIO component installed and chose "Focusrite [ASIO]" as the output.
In the past, when I chose ASIO (with other DACs, with which I had to use ASIO4All if I remember correctly), when a song was playing in Foobar2000, I couldn't hear sounds in Firefox or anywhere else.
Now, I can listen to songs in Foobar in ASIO and at the same time play a video in Youtube.
I don't understand... ASIO is supposed to work as an exclusive output, isn't it?

If I choose ASIO4All, I can't play sound in Firefox while music is playing in Foobar. is it different from other ASIO methods?
 

Vincent Kars

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Mixing is done in general by converting to float, mix, dither and convert back to integer.
Makes me wonder if this interface is bit perfect even when a single stream is playing.
 

bennetng

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Floats are common on software, not so common on hardware (e.g. interfaces with additional FPGA/DSP chips). Even the lowest float is 32-bit which is fully compatible with 24-bit integer so bit-perfect up to 24-bit without dither is entirely possible for a single stream. There are 16-bit floats but they are generally used in GPU or AI, not audio.
 
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