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Fri May 19 14:26:05 2017 UTC (3 years, 5 months ago) by schoenebeck
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* NKSP reference: Added built-in functions fade_in(), fade_out(),
  change_vol_time() and change_tune_time().

1 <html>
2 <head>
3 <meta name="author" content="Christian Schoenebeck">
4 <title>change_tune() function</title>
5 <meta name="description" content="Modifies the tuning of voices of a particular note.">
6 </head>
7 <body>
8 <h1>change_tune()</h1>
9 <p>
10 This function can be used to modify the tuning of active voices during
11 their entire life time. So you may for example implement very sophisticated
12 pitch envelopes by script by using this function. You need to pass the
13 note ID of the voices you want to alter. This function will change the
14 tuning of all active voices associated with the requested note. So if you
15 are using a layered instrument patch, then it will change the tuning of
16 all layers.
17 </p>
18 <p>
19 Internally the sampler always fades the tuning from its current value to
20 the new tuning as requested, however that tuning fade by default is so fast
21 that it sounds like its value jumps directly from its old to the new value.
22 You may also override that automated fade time explicitly by calling
23 <code lang="nksp">change_tune_time()</code> before calling the
24 <code lang="nksp">change_tune()</code> function.
25 </p>
26 <p>
27 The tuning changes set by calling this function are always applied relatively to
28 the tuning/pitch calculated by the synthesis model and sampler format. That means
29 the various sources of tuning/pitch factors like MIDI pitch bend wheel, Pitch Envelopes,
30 Pitch LFOs and other tuning factors that may be defined by the
31 instrument patch, are always processed and calculated for the voices first,
32 and the final pitch applied is always a relative combination of all those
33 factors and the one set with this function call. This does also not change
34 when you pass <code>1</code> for argument <code>??relative??</code>.
35 Or in other words: you cannot replace the tuning/pitch set by other synthesis
36 sources with this function.
37 </p>
38
39 <note class="important">
40 Release Trigger Samples: In case the affected voices cause release trigger
41 samples to be spawned later on, the tuning of those release trigger voices
42 will not be affected by this function at all. So if you need to control the
43 tuning of release trigger samples by script, then you might rather also trigger
44 those release trigger samples by script with <code lang="nksp">play_note()</code>
45 instead of using the sampler format's internal support for release trigger samples.
46 </note>
47
48 <h3>Function Prototype</h3>
49 <p/>
50 <code lang="nksp">
51 change_tune(??note??, ??tuning??, [??relative??])
52 </code>
53
54 <h3>Arguments</h3>
55 <table>
56 <tr>
57 <th>Argument Name</th> <th>Data Type</th> <th>Description</th>
58 </tr>
59 <tr>
60 <td><code>??note??</code></td>
61 <td>Note ID Number or Note ID Array</td>
62 <td>All voices of this note will be modified.<br>
63 [required]</td>
64 </tr>
65 <tr>
66 <td><code>??tuning??</code></td>
67 <td>Integer Number</td>
68 <td>Tuning change in milli cents.
69 A positive value increases the tuning,
70 a negative value decreases the tuning.<br>
71 [required]</td>
72 </tr>
73 <tr>
74 <td><code>??relative??</code></td>
75 <td>Integer Number</td>
76 <td>Whether change_tune() calls should be relative to each other.<br>
77 0: A call to <code>change_tune()</code> upon the same note will
78 replace the tuning change value set by previous
79 <code>change_tune()</code> calls upon the same note.<br>
80 1: Successive calls to <code>change_tune()</code> upon the same
81 note will be relatively applied against each other.<br>
82 [optional, default: 0]</td>
83 </tr>
84 </table>
85
86 <h3>Return Value</h3>
87 <p>None.</p>
88
89 <h3>Examples</h3>
90 <p>None yet.<p>
91
92 <h3>See also</h3>
93 <p><code>change_tune_time()</code><p>
94
95 <h3>Availabilty</h3>
96 <p>Since LinuxSampler 2.0.0.svn11.<p>
97
98 <note>
99 The third argument of this function <code>??relative??</code> is only
100 optional with NKSP. If you want to keep compatibility with KSP, then you
101 should always pass a value for that third argument of this function.
102 </note>
103
104 </body>
105 </html>

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