by Karen Lederer
[READ PART 8 : LIMITATIONS AND SUGGESTIONS FOR FURTHER STUDY]
The Acoustic and Auditory Phonetics of Human Beatboxing
Appendix 1 : File Information
(Taken from Michael Fischer’s website www.tr-808.com (ed. Now deprecated, 2014)
Bass Drum sounds start with "BD".
Claves sounds starts with "CL".
Open Hi Hat sounds start with "OH".
These two letter abbreviations which determine what the filename begins with are the exact ones used to abbreviate the sound names on the actual TR-808 instrument select dial.
On the TR-808, each knob involved in the composition/generation/synthesis of a particular drum sound has 11 uniformly spaced position marks on it (the positions on the dials are not numbered, however...and hopefully the synthesis variable they control is linearly distributed with respect to the knob position!) I consider these 11 marks to be "0" through "10". Due to the fact that the "0" position and the "10" position are the minimum (most counter-clockwise) and maximum (most clockwise) positions, one may consider "0" to be the minimum setting and "10" to be the maximum setting. I decided to use dial positions "0" (minimum), "2.5", "5.0" (middle), "7.5" and "10.0" (maximum) for my samples. As a result, I decided upon the following naming convention :
"00." would be a file whose first (and only, in this case) knob was set to 0.0 (or the minimum position).
"25." would be a file whose first (and only, in this case) knob was set to 2.5.
"50." would be a file whose first (and only, in this case) knob was set to 5.0 (or the middle position).
"75." would be a file whose first (and only, in this case) knob was set to 7.5.
"10." would be a file whose first (and only, in this case) knob was set to 10.0 (or the maximum position). It does NOT mean the knob was set to 1.0!
Example : Low Tom with "TUNING" knob set to middle position would be "LT50.". If the file happened to be a ".WAV" ("WAVE") file, the name would be "LT50.WAV".
For sounds which had TWO knobs, such as the Bass Drum, Snare Drum, and Cymbal...
The naming convention is the same, but with two additional setting position numbers after the first two...
Example : Bass Drum with "TUNING" knob set between the minimum and middle position and "DECAY" set halfway between the middle and maximum position would be "BD2575.". If the file happened to be a ".WAV" ("WAVE") file, the name would be "BD2575.WAV".
Once again, this naming convention was used for ALL the samples. Of importance is the following :
* In filenames, "TONE" and "TUNING" come before "DECAY" and "SNAPPY".
In this study, the bass drum (or kick drum as it referred to in the text) is set at BD2510, and the open hi-hat at OH50. The clave click has only one option so its filename is CL without any additional figures.
