Datenblatt-Suchmaschine für elektronische Bauteile |
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SM1125 Datenblatt(PDF) 8 Page - Nippon Precision Circuits Inc |
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SM1125 Datenblatt(HTML) 8 Page - Nippon Precision Circuits Inc |
8 / 13 page SM1125 series SEIKO NPC CORPORATION —8 Musical Specifications Maximum program steps The mask for the built-in ROM can be programmed with up to a maximum of 512 steps, where each step repre- sents either a note (sound pitch and length) or a rest. Note length (including rests) Eight rhythm values for notes and rests can be programmed. Also, 2 or more notes can be musically tied. Pitch and scale SM1125 series devices perform uniform interval length processing to reduce the error at high pitches. This maintains the relative phase when the frequency varies from the input value. The pitch varies with the clock frequency, as shown in the frequency listing in table 4. The frequency variation from the input frequency is the sum of the relative error, shown in the frequency table, plus the pitch error. (Ex) 38.4kHz system, A4 note Relative error: 8.99 cent Pitch error: −3.58 cent Total: +5.41 cent Error calculation: Table 3. Rhythm values 01234567 Note Rest 1200 × log 2 = 1200 × Reference frequency Output frequency log10 Reference frequency Output frequency log102 ≈ 3986.3 × log 10 Reference frequency Output frequency ≈ 3986.3 × log 10 440.000 441.379 ≈ 5.41 cent |
Ähnliche Teilenummer - SM1125_06 |
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Ähnliche Beschreibung - SM1125_06 |
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