Guest rasteri Posted November 25, 2015 Share Posted November 25, 2015 Cool. Give us a shout if you get stuck. Quote Link to comment Share on other sites More sharing options...
Guest petesasqwax Posted November 25, 2015 Share Posted November 25, 2015 I've got a mate who works with NI so I've asked him a few things and I've just dropped HiFiBerry a line asking if they have an option with 2-in/2-out or, obviously, ideally, 4-in/4-out. Any feedback I get from either side I'll put in here On the turntable side, would it be best to get an old PDX, for example, and take the inner workings from that to build into a new case - potentially making a 7" or 10" platter as there'd be no real need to have a 12" one - or would it be better to start with the inners of a PT01 and then look to add a direct drive motor and proper tonearm to that (would both those things be theoretically possible or am I essentially keep very little of the PT01 if I do that?) Quote Link to comment Share on other sites More sharing options...
Guest petesasqwax Posted November 25, 2015 Share Posted November 25, 2015 In theory, would this work for the audio interface? I figure at this stage I could fit a standalone pre-amp if neededhttp://cpc.farnell.com/wolfson-microelectronics/cirrus-logic-audio-card/audio-card-raspberry-pi-b/dp/SC13686 Quote Link to comment Share on other sites More sharing options...
Guest Symatic Posted November 25, 2015 Share Posted November 25, 2015 im not 100% sure, but a vestax motor driving a 7" platter might send it all wonky..... Quote Link to comment Share on other sites More sharing options...
Guest petesasqwax Posted November 25, 2015 Share Posted November 25, 2015 Yeah, I figured it might not be that simple. I'm guessing there are many better options Quote Link to comment Share on other sites More sharing options...
Guest petesasqwax Posted November 25, 2015 Share Posted November 25, 2015 on a side note: https://shop.pimoroni.com/collections/raspberry-pi/products/piano-hat"Although it's laid out as a piano it could be used for anything which requires 16 capacitive touch pads and LEDs."Is it possible to read that and not think Raspberry Pi-MPC? Quote Link to comment Share on other sites More sharing options...
Guest rasteri Posted November 25, 2015 Share Posted November 25, 2015 Weird, I thought I posted this earlier but it seems to have disappeared. Anyway I reckon the best way to get a decent 7" direct-drive is to use the motor/platter from a Numark NS7/V7. You also get built-in record position sensing so you could do away with the tonearm entirely (IMO digital is the way to go for portable turntables). You'd need to generate a 3-phase PWM signal to drive the motor's transistors but that's totally doable from a raspi. Likewise, the position sensor from a NS7 is probably just a quadrature rotary encoder, if so it's easy to interface with a raspi. That cirrus logic soundcard will work. Shame it's only 2in/2out. Quote Link to comment Share on other sites More sharing options...
Guest petesasqwax Posted November 25, 2015 Share Posted November 25, 2015 Using the NS7 platter etc. would make a lot of sense further down the line, but I think the first step is to make it work with vinyl. In that respect, is there any reason I couldn't use a PT01 initially? Quote Link to comment Share on other sites More sharing options...
Guest rasteri Posted November 25, 2015 Share Posted November 25, 2015 Yeah the pt-01 will work. Quote Link to comment Share on other sites More sharing options...
Guest petesasqwax Posted November 25, 2015 Share Posted November 25, 2015 Beautiful news - I'm buying the shit out of all of this stuff right now. My shopping list is: Raspberry Pi 2 B7" touch screen & case Power supplyCirrus logic soundcard PT01 I've got a Raiden on the way to tide me over until the Rasfader mod touches down, which should work in terms of a proof of concept Also I have the Conectiv if needs be Xwax looks like it wants a v1 Traktor control record but I only have v2 so I guess I'll need one of those too. Quote Link to comment Share on other sites More sharing options...
Guest rasteri Posted November 25, 2015 Share Posted November 25, 2015 I'd just buy a serato record, they're usually cheaper than traktor ones and xwax reads all versions. It doesn't care that you don't have a serato box. Oh also, maybe try out xwax and linux in a VM first if you're not familiar with them, you'll need to know how to compile and install linux programs etc and developing on a raspi is quite fiddly. Quote Link to comment Share on other sites More sharing options...
Guest petesasqwax Posted November 25, 2015 Share Posted November 25, 2015 Excellent advice - will do. Is there any reason why I couldn't buy a 10" Serato record and cut it down to 7" to use on the PT-01? It would, in theory, still work, right? Quote Link to comment Share on other sites More sharing options...
Guest rasteri Posted November 25, 2015 Share Posted November 25, 2015 Yeah I think so. Quote Link to comment Share on other sites More sharing options...
Guest rasteri Posted November 25, 2015 Share Posted November 25, 2015 Although, xwax used to only support absolute mode. I think they added relative mode for some controllers (I wanna say dicers?) and if that's the case you should be able to hack it to support keyboard cue points I reckon Quote Link to comment Share on other sites More sharing options...
Guest petesasqwax Posted November 26, 2015 Share Posted November 26, 2015 I'd never even thought about dicers/cue points... That's pretty awesome!I'll grab a pair of these:http://www.ebay.co.uk/itm/Serato-Performance-Series-Glass-10-Control-Vinyl-red-pair-/401031877392?hash=item5d5f5cd310:g:u88AAOSw7FRWVJOR although this would be dope if it wasn't stupid money:http://www.turntablelab.com/products/ghostface-killah-adrian-younge-twelve-reasons-to-die-ii-serato-control-vinyl-vinyl-2x7 Quote Link to comment Share on other sites More sharing options...
Guest Symatic Posted November 26, 2015 Share Posted November 26, 2015 http://www.sinclairmobile.com/en/poco.html kinda what i imagine replacing the speaker part of a pt-01 - a touch screen computer that can do stuff....... run a bit of dvs software or effects and you go line-out to a speaker system *check TTM cutting in the vid as well Quote Link to comment Share on other sites More sharing options...
Guest petesasqwax Posted November 26, 2015 Share Posted November 26, 2015 Dope!My initial version is going to use a 7" touch screen, but it's easy to switch that out for a 3.5" (for example) in later developments Quote Link to comment Share on other sites More sharing options...
Guest petesasqwax Posted November 26, 2015 Share Posted November 26, 2015 Getting ahead of myself, but back to the vinyl-free option: a friend of mine suggested using this for capturing the platter movementhttp://www.digikey.de/product-detail/en/QRB1134/QRB1134-ND/187533 He suggested having black and white sectors around the edge of the turntable that it can register Quote Link to comment Share on other sites More sharing options...
Guest rasteri Posted November 26, 2015 Share Posted November 26, 2015 Yeah that's what I was talking about when I said the NS7 probably uses a quadrature rotary encoder. It's pretty much the standard method of rotary position detection. My scratch controller started off using something similar (I printed the black/white pattern using a laser printer and transparent acetate sheets) but eventually I moved to 14-bit magnetic rotary encoders which worked great but were overkill (something like 4x the resolution of serato). Quote Link to comment Share on other sites More sharing options...
Guest petesasqwax Posted November 26, 2015 Share Posted November 26, 2015 How far did you get witht the scratch controller, man? From the photo log it looks more or less like a pretty finished article! Quote Link to comment Share on other sites More sharing options...
Guest rasteri Posted November 26, 2015 Share Posted November 26, 2015 Eh I had a working prototype but it was mono-only, didn't support MP3, the sound quality wasn't great, etc. It ran on a shitty microcontroller because there was no such thing as a raspi back then. It wouldn't be a hard project to resurrect. Quote Link to comment Share on other sites More sharing options...
Guest petesasqwax Posted November 26, 2015 Share Posted November 26, 2015 You absolutely should!! 1 Quote Link to comment Share on other sites More sharing options...
Mutis Mayfield Posted February 3, 2016 Share Posted February 3, 2016 (edited) I put some resources about this in the pt01 thread but it could be possible to use satellite ccrma distro to do realtime audio in raspi. About dedicated raspi soundcard there is the Wolfen-Oluffson one which could be useful. Also there is a workaround for usb 1.0 sound cards to make it work with raspi (all in the ccrma googlegroup). About android vs iOS the thing is iOS has coreaudio and coremidi hardcoded in the system for few hardware units meanwhile android has numerous hardware (so many different audio chips) so it requires someone like Samsung dealing with their custom SO and someone like Mixvibes dealing with djing. It seems they are awaking but nothing near djplayer DVS in iOS devices. At shared google drive anyone can find the rasteri scratchbox files with another resources related. Edited February 3, 2016 by Mutis Mayfield Quote Link to comment Share on other sites More sharing options...
Guest petesasqwax Posted February 3, 2016 Share Posted February 3, 2016 Awesome!! Quote Link to comment Share on other sites More sharing options...
Guest Symatic Posted February 3, 2016 Share Posted February 3, 2016 you seen these guys using DJ player? 1 Quote Link to comment Share on other sites More sharing options...
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