DIASS I-Card Description
The DIASS I-Card entry consists of 13 static parameters, and 13 dynamic.
The static parameters are found in the first line of an I-Card entry.
Following is an example (superscripts represent footnotes):
I(DIAS 0.0281 8.0002){ 1003000.0003 1.0004 0.0005 0.0006 0.0007 0.0008 0.0009 0.00010 2.00011 2.00012 0.05013
| Parameter |
Name |
Description |
Range |
Units |
| 1 |
Start Time |
Time in seconds since the beginning of the piece until the sound begins
playing |
Any Float >0 |
Seconds |
| 2 |
Duration |
Total duration of the sound |
Any Float >0 |
Seconds |
| 3 |
Wave Number |
Wave and Parameter Number in the form of:
W=Wave number digit, P=Partial number digit
WWWWPPP |
Integer values
> 100,000 |
None |
| 4 |
Duration Type |
Flag representing how the dynamic parameters envelopes should store
time elapses:
0 Indicates envelope times as percentages of the dry (duration - reverb
time) sound
1 Indicates envelope times are in seconds since the start of the sound
|
{0, 1} |
None |
| 5 |
Initial Phase |
Phase of the wave in % of 360 degrees. |
[0-1] |
Degrees/360 |
| 6 |
Vibrato Phase |
Phase of vibrato oscillator wave in % of 360 degrees |
[0-1] |
Degrees/360 |
| 7 |
Tremolo Phase |
Phase of tremolo oscillator wave in % of 360 degrees |
[0-1] |
Degrees/360 |
| 8 |
Vibrato Wave |
Flag representing what type of wave to use for the Vibrato Oscillator.
0: sine wave.
???are there any more???
|
{0...?} |
None |
| 9 |
Tremolo Wave |
Flag representing what type of wave to use for the Tremolo Oscillator.
0: sine wave.
???are there any more???
|
{0...?} |
None |
| 10 |
Channel Toggle |
Flag representing the bias of the Channel Dynamic Parm.
0?: Channel amplitude is percentage of sound in LEFT speaker
1?: Channel amplitude is percentage of sound in RIGHT speaker
|
{0, 1} |
None |
| 11 |
Hall Size |
Number of reverberations ("bounces") obtained from the reverb
unit. |
{0...} |
Bounces |
| 12 |
Reverb Time |
Time in seconds it takes the reverb to decay |
[0-?] |
Seconds |
| 13 |
Clear Reverb |
?? |
?? |
?? |
The Dynamic parameters each take up 3 lines. Following is an example:
4.6199999 0.6000000 0.7800000 0.0000000
2.0000000 1.0000000 1.0000000 0.0000000
0.0000000 0.0030000 0.0028500 0.0000000
The first line is the time value. If the Duration Type is 0, this time
value is expressed as a percentage of the total dry duration of the sound.
If the Duration Type is 1, the time values are represented in seconds.
The second line is the path type. This is a flag (currently 1or 2) representing
the path type. 1 represents a Linear path from one envelope segment to
the next, and 2 represents an exponential path.
The third line is the amplitude (y-value) of the corresponding envelope
segment. This value's range and meaning is dependent upon the dynamic parameter
it represents.
Following is an envelope, and it's corresponding triplet representation:
^
2| /----------\
1| / \---------
0| / \
(Assuming Duration Type is 0)
0.1200000 0.4000000 0.0800000 0.3600000 0.0400000 0.0000000
1.0000000 1.0000000 1.0000000 1.0000000 1.0000000 0.0000000
0.0000000 2.0000000 2.0000000 1.0000000 1.0000000 0.0000000
For the first 12% of the duration of the sound, a linear path is drawn
from 0.0000000 to 2.0000000.
The next 40% of the sound stays at 2.0000000
The next 8% drops from 2.0000000 to 1.0000000
Then 36% remains at 1.0000000
Finally, the last 4% drops from 1.0000000 to 0.0000000
The Dynamic Parameters are (from the top triplet to the bottom):
| Dynamic Parameter |
Description |
Amplitude Range |
| Frequency |
The frequency parameter allows us to change the frequency of a partial
over time.
Frequency is stored as (hz - 20) / 11000, where hz is the frequency
in Hertz
|
[0-1] |
| Amplitude |
The amplitued parameter allows us to change the volume of a partial
over time.
Amplitude is stored as a percentage of 32767 (largest possible 16-bit
amplitude)
|
[0-1] |
| Vibrato Amplitude |
Amount of deviation in the frequency of the sound |
?? |
| Vibrato Rate |
Rate of the vibrato waveform in Hertz |
[0-22050?] |
| Tremolo Amplitude |
Amount of deviation in the amplitude of the sound |
?? |
| Tremolo Rate |
Rate of the tremolo waveform in Hertz |
[0-22050?] |
| Channel |
Percentage of the total sound distributed into the speaker indicated
by Channel Toggle, i.e. if Channel Toggle is 0, and the y-val for an envelope
segment is .4, 40% of the sound will come from the left speaker (leaving
60% in the right) |
[0-1] |
| Random Effect |
??? |
??? |
| Timbre ID |
Allows a partial to change it's Timbre membership over time. To be
used in sound morphing, though not implemented yet.
???
|
??? |
| Reverb Mix |
Percentage of the partial to be applied to the reverb unit over time.
For example, a y-val of .4 here would indicate that 40% of the sound (amplitude?)
should be sent to the reverberator |
[0-1] |
| Transient Amplitude |
Size of transients (spikes or nuances) in the partial
measured in ??
|
?? |
| Frequency Transient |
Probability of a frequency transient occuring during a particular segment
of the partial |
[0-1] |
| Amplitude Transient |
Probability of an amplitude transient occurring during a particular
segment of the partial |
[0-1] |
Following is a sample DIASS I-Card entry for one partial of a sound:
I(DIAS 0.028 8.000 ){ 1003000.000 1.000 0.000 0.000 0.000 0.000 0.000 0.000 2.000 2.000 0.050
6.0000000 0.0000000
1.0000000 1.0000000
0.0145455 0.0145455
0.0030000 0.5970000 0.1230000 0.4770000 1.4970000 3.3030002 0.0000000
2.0000000 2.0000000 1.0000000 1.0000000 2.0000000 1.0000000 0.0000000
0.0000000 0.0050000 0.8341666 0.8000000 0.5006162 0.5000000 0.0000000
4.6199999 0.6000000 0.7800000 0.0000000
2.0000000 1.0000000 1.0000000 0.0000000
0.0000000 0.0030000 0.0028500 0.0000000
6.0000000 0.0000000
1.0000000 0.0000000
0.9410000 0.9410000
5.9998999 0.0000000
1.0000000 0.0000000
0.0000000 0.0000000
5.9998999 0.0000000
1.0000000 0.0000000
0.0000000 0.0000000
6.0000000 0.0000000
1.0000000 0.0000000
0.5290000 0.5290000
5.9998999 0.0000000
1.0000000 0.0000000
0.0000000 0.0000000
5.9998999 0.0000000
1.0000000 0.0000000
0.0000000 0.0000000
6.0000000 0.0000000
1.0000000 0.0000000
0.0010000 0.0010000
5.9998999 0.0000000
1.0000000 0.0000000
0.0000000 0.0000000
5.9998999 0.0000000
1.0000000 0.0000000
0.0000000 0.0000000
5.9998999 0.0000000
1.0000000 0.0000000
0.0000000 0.0000000
}
This document was generated by Mike Piacenza, February 11, 1998