“Microduino-Module AudioPro/zh”的版本间的差异
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'''可参考:[http://newt.phys.unsw.edu.au/jw/notes.html NUSW]''' | '''可参考:[http://newt.phys.unsw.edu.au/jw/notes.html NUSW]''' | ||
[[file:MIDIlist.gif|430px|thumb|left| MIDIlist]] | [[file:MIDIlist.gif|430px|thumb|left| MIDIlist]] | ||
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+ | *Note names, MIDI numbers and frequencies are related here in tables and via an application that converts them. The musical interval between two notes depends on the ratio of their frequencies. See Frequency and Pitch for more details and an introduction to frequency and pitch. | ||
+ | *An octave is a ratio of 2:1 and, in equal temperament, an octave comprises 12 equal semitones. Each semitone therefore has a ratio of 21/12 (approximately 1.059). By convention, A4 is often set at 440 Hz. These data were used to calculate the first table below, which gives the frequency of any standard keyboard note or MIDI note number. To convert from any frequency to pitch (i.e. to the nearest note and how far it is out of tune), go to the frequency to note converter. | ||
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*This table is reproduced inverted below, i.e. with high pitch at the top. | *This table is reproduced inverted below, i.e. with high pitch at the top. |
2016年5月6日 (五) 05:38的版本
Language | English |
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Microduino AudioPro是以VS1053为解码器,集成2.2W立体声功放,并且支持2.5mm立体声耳机接口的多功能音频模块,支持MIDI功能
目录特色
规格
引脚说明
文档
开发
应用问题解答历史图库视频附录MIDI numbers,Note names and frequencies可参考:NUSW
MIDI旋律乐器组(GM1)
MIDI打击乐器组(GM1+GM2)
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