wheelema
Boner-obo
to a soundcard with only one s/pdif input. I don't know.
Blue Bear Sound
New member
If you want to sum them together, you have no choice but to use a digital mixer... if you simply want one or the other, you either switch/unswitch them manually, or use a digital patchbay...
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lumbago
New member
I can recommend the Roland M-1000 mixer for this. I push digital signals from a Focusrite preamp, a Lexicon MPX-500 and an XV-5050 simultaneously, into the M-1000, then on into the Echo Mia card's SP/DIF input. Totally quiet and transparent, with 56-bit resolution, and also accepts signals at different resolutions and frequencies simultabeously.
My own coarse rule of thumb is that in order to add two 16 bit sources you need 32 bits of resolution at the mixer. To add two 24 bit sources you need 48 bit resolution at the mixer.
You may also have the issue of determining the master device for word clock purposes.
There may be cheaper options, but this device (M-1000) has worked flawlessly on gigs (pit orchestras) and in the studio for the past 14 months.
My own coarse rule of thumb is that in order to add two 16 bit sources you need 32 bits of resolution at the mixer. To add two 24 bit sources you need 48 bit resolution at the mixer.
You may also have the issue of determining the master device for word clock purposes.
There may be cheaper options, but this device (M-1000) has worked flawlessly on gigs (pit orchestras) and in the studio for the past 14 months.
wheelema
Boner-obo
That kind of nukes devices that offer only s/pdif out. The cost of adding the ability to deal with multiple outputs without switching cables kicks the cost up too much. Simpler/cheaper to deal with different gear.
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TexRoadkill
Audio Bum
lumbago said:
When you mix a 24 track project @24bits then you need a 576bit processor
FYI- When you sum tracks it doesn't actually double the bit depth. There could be an arguement made to mixing with a greater bit depth then the original tracks but it's hardly exponential.
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lumbago
New member
OK - the greatest 2 bit number is decimal three, and you add another three and you need three bits (an extra bit) to express decimal 6.
So for 24 channels at 24 bits you'd notionally need 48 bits in the summed digital output stream to avoid clipping or need for further conversion.
Point taken. It isn't exponential. I stand corrected.
So for 24 channels at 24 bits you'd notionally need 48 bits in the summed digital output stream to avoid clipping or need for further conversion.
Point taken. It isn't exponential. I stand corrected.