Wednesday, 10 August 2011

Routing possibilities

This could be a solution for introducing true 24 bit / 192khz recording. The inputs are distributed over ethernet to a PCIe card that functions as a DAS. Up to 64 in/ 64 out channels at max record rate. Data throughput roughly 74 Mb/sec maximum, without overheads.


Therefore, this is how the studio would function. Each Red Net 4 box (shown above) costs £2000 currently, while the PCIe adapter is £800... Lets hope in 10 years there are second hand units about or they have reduced in price!

Tuesday, 9 August 2011

Audio inputs

So, the problem of inputs rears its ugly head. With only one ADAT input, the previously preferred audio interface - the 1616m from EMU falls short in the digital girth department.

The scenario which might use the most channels is recording a drum kit in the dry room. Lets say at maximum, 8 channels of 24bit 192khz, for the sake of the best downsampling later in the train, probably to redbook audio. I can get a measly 2 channels of that spec into the 1616m.

This presents a problem. Do I use an alternative soundcard? The Lynx AES16e-SRC looks to be the best digital contender, with an even lower noise floor of 141 dB (this must be due to the pc's actual power supply). However, monitoring the results would be difficult without some form of DAC after a digital output.

A simple way around this may be to use the 1616m Audiodock without using the ASIO drivers. Two audio interfaces can be used simultaneously if they do not use the same access method. ASIO could be dedicated to the drum inputs, whereas the remaining inputs could be handled through WDM.

I'm largely unhappy with WDM taking even a portion of the load. It has a significantly higher latency and WDM audio drivers are known to provide inefficiency to recording situations. Whilst I would gain the ability to access the digital recording of the dry room using the Lynx, I would not be able to use the 1616m to do anything else other than be a monitor out. MIDI in/out, balanced XLR for guitar performances not applicable.

Somehow I feel there must be another solution.









Dry room v1.0b

Grid and rubberised float floor feet laid out.

Air in duct laid out in sillcone-rubber wrapped foam insulation.

 First layer of boards laid down, including ventilation grate space.

 75mm raised section supports.

 Insulation laid between supports.

 Finish floor level complete.

 Suspended ceiling supports installed.

 Suspended ceiling supports connected via 50 x 50mm, 2mm thick box steel. Holes cut at regular intervals to reduce weight.

Insulation wrapped around suspended ceiling supports and support ties installed. This gives structural rigidity fit for purpose.