Any windows programmers here ? |
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slaz
Old Croc Joined: 27 November 2009 Location: London E2 Status: Offline Points: 2713 |
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Posted: 04 December 2018 at 11:22pm |
.... with knowledge of "device-level" software internals ? Vague idea I've had is :- Windows machine with 2 hardware audio devices e.g. 1 native onboard + 1 USB audio device. Would it (potentially) be possible to route the o/p of a program (e.g. audio player, DJ s/w etc.) to the 2 devices simultaneously - and then have a (separate) s/w EQ of some kind applied to each of these 2 hardware outputs ? Idea would be to achieve something akin to a 2-way crossover internally in the PC. TIA
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I-shen Soundboy
Registered User Joined: 21 December 2016 Location: Big Smoke Status: Offline Points: 375 |
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It would be considerably easier to use a single soundcard/device with sufficient outputs for the task rather than trying to get windows drivers to address multiple devices. Most consumer-grade software probably couldn't cope either, multi-device addressing is a pro-level feature.
Bumringer u-phoria for eighty quid would give you four outputs, but that's halfway to a secondhand ultradrive or a real LMS...
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slaz
Old Croc Joined: 27 November 2009 Location: London E2 Status: Offline Points: 2713 |
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Yeah I get (in broad terms) what you're saying, but the context is :- Battery powered portable sound system (where everything is pretty crude/approximate) and where a DCX or similar (or analogue Xover) is way too bulky, too much wiring, and getting power to it is a right faff. There are "hi-fi type" electronic (analogue) Xovers available as bare PCBs, but being driven by op-amps they need dual rail PSU which is a bit of a pain to derive from batteries ... and would still need the wiring, casing, connectors etc. If it were possible to "do something crude in s/w" it could be dead handy - even if it were no more than dead simple 12db/oct type of thing. The other route is mini-DSP I guess - which quite a few folk in here have used/pursued, and some have found to be a bit problematic. Seem over-priced too. In my own case, the laptop is a oldish netbook with Intel Atom 1.6GHz single core CPU running winXP - so might be light on CPU anyway ..... just musing on the possibilty really. I don't have enough knowledge on the s/w architecture of windows (or any other OS). |
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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ReWuschel, Jack but never made them work. You can physically route outputs to inputs. In theory that would be option to rerouting music program to crossover program. Crossover program like Cubase/Reason/FL you can run on Asio and gain access to many audio devices simultaneously.
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Meat
Old Croc Joined: 05 June 2009 Location: Manc Status: Offline Points: 1514 |
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Running the 2 laptops separately connected via wifi or ethernet and syncing using Traktor link would get you quite a long way but both would then need to have an output. We ran 2 synced laptops one with a controller and one with digital vinyl for a laff at a midweek techno and bucket of chicken session (lol). Fun setup. The standard setup just puts a mixer inbetween the outputs but both computers always need 2 output devices as monitoring can't work properly unless there's a main out and a monitor out for each.
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Don't test the champignon sound
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APW
Young Croc Joined: 13 November 2012 Location: Kent, UK Status: Offline Points: 1173 |
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A simple active x-over can be made very small an only needs a few extra components to make it work single rail, Below is a single rail 100hz active x-over that can be made slightly larger than a postage stamp, it will work on any voltage from about 9 volts to 30volts. the TL072 is not the best choice for single rail but will work. Edited by APW - 05 December 2018 at 12:19pm |
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Jo bg
Young Croc Joined: 08 March 2017 Status: Offline Points: 552 |
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Foobar has got crossovers , multiple outputs ,mono summing options and asio support.
I think also a line in option, so maybe could be hacked at your needs... Free, worth a shot, light on cpu.
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odc04r
Old Croc Joined: 12 July 2006 Location: Sarfampton Status: Offline Points: 5483 |
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As said just build an active low level analog xover, deriving a dual rail supply from a single can be as simple as 2 capacitors, 2 resistors, one op amp, and a series cap to DC block the input signal such that only AC passes to your new virtual earth. Not too much drama
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I-shen Soundboy
Registered User Joined: 21 December 2016 Location: Big Smoke Status: Offline Points: 375 |
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OldSkool car crossover, preferably an Alpine, every time. (Unless you're using modern car amps with crossovers, but same thing). |
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slaz
Old Croc Joined: 27 November 2009 Location: London E2 Status: Offline Points: 2713 |
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Hmm ... OK - thanks for that - might just about be do-able on veroboard ? Mate over the road might be up for tinkering that together. As it happens, 100Hz is about right for what I have in mind. Are the virtual-earth things any more prone to ground-loop hassles than other things ? If there are things like switch-on thumps I can work around it OK. Edited by slaz - 07 December 2018 at 5:18pm |
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slaz
Old Croc Joined: 27 November 2009 Location: London E2 Status: Offline Points: 2713 |
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OK guys - thanks for replies ... bit slow off the mark responding cos I've spent way too much time in doctors, hospitals recently :-/ |
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gen0me
Young Croc Joined: 20 February 2016 Location: UK Status: Offline Points: 999 |
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Never tested.
Edited by gen0me - 25 December 2018 at 12:33pm |
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