By
philipp
Tue Dec 14, 2010 9:02 am
Creating sample instruments based on keygroups is fascinating but time consuming I confess. My motivation is to have a basic set of Wurlitzer, Rhodes and Pianos in my MPC 5000, thus not having to carry the 18kg of my Nord Stage 88 all the time...
First, I created a sequence which plays all the notes I want to sample at a certain velocity (to give it a start, I took three notes per octave: C-E-G#, over 6 octaves). The sequence makes sampling reproducable and eases the workflow. First sequence was at velocity 127, then I copied the sequence 3 times and changed the velocity in the STEP EDIT mode to 95, 63 and 31.
Then I created a SONG which calls all four sequences in a row. This gives me the possibility, to record the stage piano into 2 channels of the hard disc recording section of the MPC. So, after creating the SONG switch to HD RECORD and set the channels appropriate. Then start playing the song and record all into 2 tracks (for basic stereo material).
A small comment on the sample lengths: Usually, a grand piano will need up to 12 sec samples in the lower section (C1-C3) and 2 sec in the upper section (C5-C7). Rhodes and Wurlitzer are much different, you can get along with much shorter samples.
The recorded tracks can then easily be exported as WAV files. In the above mentioned example with 3 notes per 6 octaves (C1-C7) at 4 velocities this means 77 samples to be created - this is something to be done at the computer. I used the freeware program Audacity, combined the 2 tracks to one stereo track and cut out every note played/recorded (with the comand "export selection"). Each sample is named accordingly, e.g. "C1 127 stereo", stored in a folder e.g. "/Yamaha C7/samples/stereo". Afterwards, with batch automation, I converted all stereo files to mono and stored them in "/Yamaha C7/samples/mono".
Cutting the recorded track into single samples is the most time consuming part. 77 samples take about 10 hours of concentrated work. But this is the most viral part of creating the keygroup instrument
In the above mentioned example, this made 48MB stereo samples and 23,5MB mono samples. This gives you the maximum flexibility for using your instrument. In a live environment, playing the piano in a rock band, mono samples are sufficient enough. It might be more important to have more velocity layers on board or to be able to modify the sound from soft to hard (soft sound for your piano intro, hard sound for getting through the mix in the middle section, e.g.).
You may also improve the stereo experience for your mono samples, if you use the keygroup panning. This allows you to define the panning of each single keygroup, thus spreading the mono samples in the stereo panorama. Further improvements can be achieved through using the crossfade in the middle section (C3-C5)
After having created all samples on the computer I transfer them to the MPC, rather via USB or Compact Flash. In case you want to use several instruments at once, you will need to rename the samples in order to give them unique instrument identifiers (otherwise MPC will overwrite them while loading into memory). Use a automation tool for renaming files like PS FileRenamer 2.97 from Polarsoft.
I think, creating the keygroup in the PROGRAM section of the MPC is common knowledge. Rather interesting is the question, how many layers do I need? How can I further reduce memory usage of my instrument? I will come to this later on.