User Manual for Scratch Match (Alpha Prototype)
Contents
1. Match free 135mb http www cim mcgill ca alvinlaw sm docs alpha SM _alpha zip The zip file includes the program PIE script along with all the songs it uses Unzip everything to the same folder anywhere Hardware needed Audio Separation Adapter 1 1 8 male stereo splitter to 2x 1 8 female mono Provided by the SM group Computer Any WindowsXP or higher computer with a headphone out jack and a usb port will be sufficient Wiimote Nunchuk A Nintendo Wiimote and its attachment is necessary 2xAA batteries too of course Turntable slipmat Any old turntable will do Our system only uses the spinning platter so even if the needle or arm is broken it will still work The slipmat is essential for scratching Vinyl disc IR LEDs This disc is custom made from an old record IR LEDs and hearing aid batteries Details on how to make your own is also in this manual Headphones Any set of headphones or ear buds will work although we recommend DJ monitor style headphones where each cup can rotate outwards Computer speakers Any powered speakers with a 1 8 male connector will work Stereo Splitter Adapter optional 1 1 8 male stereo splitter to 2x 1 8 female stereo Provided by the SM group Haptic Floor optional Provided by the SM group Not aware of any haptic floors on the market The optional hardware is not vital to the enjoyment of DJ ing but may help facilitate faster and more natu2. a Song Using the mouse 1 Select a song from the library 2 Click the Load button to load the song onto whichever deck you want Let s start off with Deck A 3 Click the Cue button to play the song through the headphones If you don t hear anything check that the record is spinning If not make it spin by pressing the on button The physical record now controls the track You can fast foward or rewind by using your hand to turn the record If you press down on the record the track will pause 4 Click the Play button to play the song through the speakers You should not hear anything at this point 5 Move the volume slider up You along with your audience will start to hear the music How to Mix in a New Song This is very much like how to start playing a song While the live song is playing Using the mouse 1 Set the volume on deck B to zero if not already set This is so that the audience does not hear a sudden jump in of a song Songs should be first beat matched then faded in slowly pe Track Menu 320tem i SS 178 oen 4 Click the Cue button to preview the song The song will play through your headphones so use your free hand to hold one side of the headphones to your ear The physical record now controls deck B Track Menu 5 Beatmatch using the pitch shifter You should be able to hear both the live track and the cue track since only one
3. ear is listening to the headphones Judging by what you hear use the pitch shifter of deck B to either speed up or slow down the cue track It may be challenging at first but it will come with practice We want the beat frequencies to match After you find the appropriate frequency we need to adjust for phase We do this by first noting the position of the pitch that matches Then move pitch slightly higher for 1 sec and then back down again Repeat until the beats line up This skill is challenging so don t be discouraged if you don t get it the first few times You could also try using your hands to speed up or slow down the physical record for a split second 6 Click the Play B button to play the song through the speakers The music will stop playing through the headphones and play through the speakers Again you should hear nothing as the volume button is set to zero ZIE Track Menu 7 Slowly fade in the new song The beat frequencies should still be matched and there will be a period where both songs are overlayed on one another If it sounds good hold this mix for long If not fade out the old song It s entirely up to you 8 Slowly fade out the old song Be sure to fade out the old song before the track finishes playing Track Menu And that s all there is to it To continue mixing just repeat the above steps but switching B with A and then vice versa Happy mixing How to Scratch Scratchin
4. User Manual for Scratch Match Alpha Prototype Introduction Welcome to the world of the disc jockey DJ The role of a DJ is to control the flow of music so that transitions between songs appear as smooth as possible In addition you are putting on a show and your creativity will get you noticed Weaving different pieces of music together can create a musical experience that is unique and greater than the sum of its parts Our program is here to allow you to play with and practice several of the essential skills required to DJ effectively Installation Windows Only Software needed Apple Quicktime full installation http www apple com quicktime download The full installation is required Max MSP Runtime free 5mb http www cycling74 com download maxmspruntime463 zip Unzip and run the install script msi file with default options This program allows you to interact with but not edit Scratch Match GlovePIE 0 29 free 1 61mb http carl kenner googlepages com glovepie download Unzip anywhere in the computer This program runs a script file that converts the rotating LED lights on the record into a speed of rotation Do NOT use version 0 30 IVT Bluesoleil 2 3 trial 27mb http www bluesoleil com download index asp topic bluesoleil edr Unzip and install Being a trial it will only let you transmit 5mb of data per session which translates into about an hour Restart as necessary Scratch
5. g is very much an art and there is no real rules that prevent you from exploring different kinds of sounds you can make One very popular method is the use one hand to move the vinyl back and forth and to use your other hand to tap the cross fader to mute and unmute the sound This is known as cutting Instead of the cross fader we are using the nunchuk joystick Moving the joystick to the left or right will mute the sound Try moving the record with one hand and rapidly cutting the sound with nunchuk You will get some very unique sounding noises Scratching speech over music usually makes for good results so try this Load a music heavy track onto a deck and have it play live Load a track with lots of singing or speaking on the other deck and scratch the vocals on top of the live track The Scratch indicator on top of each deck indicates which deck is connected to the hardware You can click the switch button to swap control to the other deck for more advance disc juggling moves How to make a Vinyl with IR lights Since we are using digital sound files the vinyl is only for control and its content is never heard We recommend the cheapest vinyl you can find because scratching the vinyl will create many smudge marks You will need 2 IR leds Hearing aid batteries usually 1 4V Old vinyl disc Tape Soldering Iron and solder We want the IR sources to be bright for the Wiimote to see yet light so that it does not change t
6. he dynamics of the record Because of the spinning nature of the vinyl batteries are necessary This also means that they must be replaced periodically Luckily hearing aid batteries are cheap and last for many hours The most secure method is to solder the batteries directly into the leads of the LED Use a digital camera to check for the correct orientation and be careful not to short the battery in the process If you are uncomfortable with soldering using a small clamp may work but be sure to insulate the clamp if it is metal Since you do not want the LEDs to be permanent you will need to change the battery tape is the way to secure the LEDs Bend the head so that it faces upwards and tape the LED battery unit down with small strips of tape we used duct tape We recommend close to the edge of the record label so that it does not get in the way when scratching Try to line the two LEDs up with the center of rotation as much as possible And there you have it Tips Many DJs squeeze the monitor headphones in between their ear and their shoulder to keep both hands free to do other things
7. ral beatmatching How to setup the Hardware 1 Setup a record player on a desk Keep it to the left if you are right handed of where you expect to sit Plug it in 2 Place vinyl with LEDs on platter Vinyl MUST be spinning for tracks to play Make sure the slipmat is between the vinyl and the platter 3 Attach a Wiimote to a shelf such that the camera is facing down towards 4 the turntable 30cm above Tip If you leave the battery cover off there is a nice indent with which to hold the Wiimote up Our implementation was a simple computer expansion slot cover and duct tape How you attach your Wiimote is entirely up to you 4 Place the nunchuk to the right of the turntable and sandwich it in place with something like a heavy book Or in our case a roll od duct tape We have not found a really good way of securing it It is also up to you if you want to hold it in mid air We find it easier and faster not to use our thumb to cut the sounds 5 Setup the haptic floor under the desk The haptic floor includes both the vibrating tiles and the amplifier which also acts as a low pass filter We amplify the bass so that you feel the beat and soften the treble so that it is not audible to the audience 6 Connect the stereo splitter into the audio out of the computer One channel is for the haptic floor one channel is for the channel splitter Moojoneg 7 Plug the computer speakers into the L channel of the
8. splitter and headphones into the R channel 8 Turn on the computer and plug in the Bluetooth adapter How to start Scratch Match 1 Setting up Bluesoleil 2 3 a Start IVT Bluesoleil software b Click on the orange sphere to search for Bluetooth devices OS F222 RO PwN r Q c Press 1 2 on the Wiimote The blue lights should flash d Double click on the Wiimote while the lights are flashing e When the mouse icon has a square around it click it to connect f You should see a line connecting the Wiimote to the orange sphere 2 Setting up GlovePIE 0 29 a Start the GlovePIE program by double clicking the GlovePIE exe file in the folder you unzipped it to b File gt gt Open choose the file SM_rotation PIE from the Scratch Match zip package c Click the Run button d Look at the values in the debug output Rotate the disc around and check that they change If they do not try restarting GlovePIE and check the Bluetooth connection It is not your fault this is happens sometimes 3 Start Scratch Match in Max MSP 4 6 Runtime a Start the Max MSP Runtime program b File gt gt Open then choose the file named SM_alpha pat from the Scratch Match zip package c Maximize both windows and recenter the interface so that it looks like this You are done Now you can try to figure out how to DJ or read our short guide for some pointers Remember to start the turntable How to Start Playing
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