Microduino-Module AudioPro

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Microduino-AudioPro Microduino AudioPro is a multifunctional audio module, with VS1053 as the decoder, integrating 2.2W stereo amplifying, and supporting 2.5mm stereo earphone interface and MIDI function. Features Support multiple formats of decoding：MP3/WMA/AAC/WAV/Ogg Vorbis/MIDI. Can real-time imitate as much as 128 kinds of MIDI instruments. Integrate 2.2w stereo amplifier. With 2.5mm stereo earphone interface onboard. Earphone/extroverted automatic switchover function. SPI high-speed communication interface. Small, cheap, stackable and open; Open-source hardware circuit design, and compatible-with-Arduino programming development environment; Unified Microduino interface specification and abundant periphery modules, which can be quickly extended and connected with other modules and sensors which meet the Microduino interface specification, conveniently and flexibly; 2.54-spacing mother line interface is convenient for integration to the pegboard. Specification Support multiple formats of decoding: MP3/WMA/AAC/WAV/Ogg Vorbis/MIDI Can real-time imitate as much as 128 kinds of MIDI instruments. Universal MIDI and file 0 in SP‐MIDI format can be played, and files in format 1 and 2 must be transformed into format 0 by the users. Number of polyphony is 64 at most, and the number of polyphony that can continue at most is 40. Integrate 2.2w stereo amplifier（LM4863） Can control the enable through the GPIO4 of VS1053. With 2.5mm stereo earphone interface onboard. Earphone/extroverted automatic switchover function. 18-bit oversampling, multi-bit, sigma‐delta type high-precision DAC Oversampling generally refers to higher sampling rate several times than the nominal sampling rate, and it is commonly used to improve the sampling accuracy. It means when restore the digital sound, use sampling rate several times higher than the nominal sampling rate to output, which can make the abrupt of the ladder of the audio flatten out, to lower the digital background noise and reduce the distortion, thereby get high-quality audio surpassing the effect of the original sampling rate outputting. SPI high-speed communication interface Electrical specification VS1053: 3.3V, 30~60mA LM4863: 5V, 1A Introduction of Pins Pin D2 is real-time MIDI interface. Real-time MIDI is not enabled by default. If you want to enable it, just short connect the jumper on the back of the module. After enabling the real-time MIDI, the baud rate of UART should be 31250bps, and SPI interface at this time can't be used. Microduino-AudioPro Spec Names of pins of module AudioPro Microduino pins Functions SCK D13 SPI bus clock SI D12 Data inputting pin SO D11 Data outputting pin CS A3 SPI chip selecting signal(need be defined in the program) DCS A2 Data/command mode choose (need be defined in the program) DERQ 3 Interrupt the output (need be defined in the program) MIDI 2 MIDI input (not enabled by default) Documents Eagle SCH：File:AudioPro.pdf Materials of module vs1053(Chinese)：File:Vs1053 cn.pdf Materials of module vs1053(English)：File:Vs1053.pdf Development You can implement the function test through _06_Microduino_AudioPlus_VS1053 library: github The relevant sample programs to download：github Audio_MIDI during them is the sample program that the SPI interface real-time realizes MIDI through loading patches. Audio_ROM during them is the sample program to play the audio files in ROM. The material of MIDI can be seen in the Appendix. Tool for the hexadecimal to audio files：File:DataToHex.zip Application FAQ History Gallery Microduino-AudioPro TOP Microduino-AudioPro BUT Video Appendix MIDI numbers,Note names and frequencies You can refer to：NUSW MIDIlist 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. 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). This table is reproduced inverted below, i.e. with high pitch at the top. 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 written by Andrew Botros. How to do the caluation? Suppose thattwo notes have frequencies f1 and f2, and a frequency ratio of f2/f1. An octave is a ratio of 2:1, so the number of octaves between f2 and f1 is no = log2(f2/f1). Now to divide the octave into smaller units. In equal temperament, where all semitones have the same frequency ratio of 21/12, conversion between note name and frequency is simple. First, one needs a reference note and frequency. This is usually A4, which is often set at 440 Hz. For a note that lies n semitones higher (or −n semitones lower), the frequency is then fn = 2n/12*440 Hz. Conversely, one can obtain n, the number of semitones from A4, from n = 12*log2(fn/440 Hz). Similar equations give no, the number of octaves from A4, and nc, the number of cents from A4: no = log2(fn/440 Hz) and nc = 1200*log2(fn/440 Hz). In electronic music, pitch is often given by MIDI number: let's call it m for our purposes. m for the note A4 is 69 and increases by one for each equal tempered semitone, so this gives us a simple conversion between frequencies and MIDI numbers (again using 440 Hz as the pitch of A4): m = 12*log2(fm/440 Hz) + 69 and fm = 2(m−69)/12(440 Hz). The notation used here is not universal: in German speaking countries, H is used instead of B, and B is used for Bb. (This allowed Bach to write his name in the Art of Fugue.) And of course when different tuning systems are used, different names are applied. MIDI Melody Instruments Group(GM1) Piano 1 Acoustic Grand Piano 2 Bright Acoustic Piano 3 Electric Grand Piano 4 Honky-tonk Piano 5 Rhodes Piano 6 Chorused Piano 7 Harpsichord 8 Clavichord Color percussion instruments 9 Celesta 10 Glockenspiel 11 Music box 12 Vibraphone 13 Marimba 14 Xylophone 15 Tubular Bells 16 Dulcimer Organ 17 Hammond Organ 18 Percussive Organ 19 Rock Organ 20 Church Organ 21 Reed Organ 22 Accordian 23 Harmonica 24 Tango Accordian Guitar 25 Acoustic Guitar (nylon) 26 Acoustic Guitar (steel) 27 Electric Guitar (jazz) 28 Electric Guitar (clean) 29 Electric Guitar (muted) 30 Overdriven Guitar 31 Distortion Guitar 32 Guitar Harmonics Bass 33 Acoustic Bass 34 Electric Bass(finger) 35 Electric Bass (pick) 36 Fretless Bass 37 Slap Bass 1 38 Slap Bass 2 39 Synth Bass 1 40 Synth Bass 2 String instruments 41 Violin 42 Viola 43 Cello 44 Contrabass 45 Tremolo Strings 46 Pizzicato Strings 47 Orchestral Harp 48 Timpani Concert/chorus 49 String Ensemble 1 50 String Ensemble 2 51 Synth Strings 1 52 Synth Strings 2 53 Choir Aahs 54 Voice Oohs 55 Synth Voice 56 Orchestra Hit Copper tube 57 Trumpet 58 Trombone 59 Tuba 60 Muted Trumpet 61 French Horn 62 Brass Section 63 Synth Brass 1 64 Synth Brass 2 Reed pipes 65 Soprano Sax 66 Alto Sax 67 Tenor Sax 68 Baritone Sax 69 Oboe 70 English Horn 71 Bassoon 72 Clarinet Flutes 73 Piccolo 74 Flute 75 Recorder 76 Pan Flute 77 Bottle Blow 78 Shakuhachi 79 Whistle 80 Ocarina Synthesis of tonic 81 Lead 1 (square) 82 Lead 2 (sawtooth) 83 Lead 3 (caliope lead) 84 Lead 4 (chiff lead) 85 Lead 5 (charang) 86 Lead 6 (voice) 87 Lead 7 (fifths) 88 Lead 8 (bass+lead) LeaclSynth 89 Pad 1 (new age) 90 Pad 2 (warm) 91 Pad 3 (polysynth) 92 Pad 4 (choir) 93 Pad 5 (bowed) 94 Pad 6 (metallic) 95 Pad 7 (halo) 96 Pad 8 (sweep) Synthetic effects 97 FX 1 (rain) 98 FX 2 (soundtrack) 99 FX 3 (crystal) 100 FX 4 (atmosphere) 101 FX 5 (brightness) 102 FX 6 (goblins) 103 FX 7 (echoes) 104 FX 8 (sci-fi) Folk instruments 105 Sitar 106 Banjo 107 Shamisen 108 Koto 109 Kalimba 110 Bagpipe 111 Fiddle 112 Shanai Percussion instruments 113 Tinkle Bell 114 Agogo 115 Steel Drums 116 Woodblock 117 Taiko Drum 118 Melodic Tom 119 Synth Drum 120 Reverse Cymbal Sound Effects 121 Guitar Fret Noise 122 Breath Noise 123 Seashore 124 Bird Tweet 125 Telephone Ring 126 Helicopter 127 Applause 128 Gunshot MIDI Percussion Instruments Group(GM1+GM2) 27-High Q 28-Slap 29-Scratch Push 30-Scratch Pull 31-Sticks 32-Square Click 33-Metronome Click 34-Metronome Bell 35-Acoustic Bass Drum 36-Bass Drum 1 37-Side Stick 38-Acoustic Snare 39-Hand Clap 40-Electric Snare 41-Low Floor Tom 42-Closed Hi-Hat 43-High Floor Tom 44-Pedal Hi-Hat 45-Low Tom 46-Open Hi-Hat 47-Low-Mid Tom 48-Hi-Mid Tom 49-Crash Cymbal 1 50-High Tom 51-Ride Cymbal 1 52-Chinese Cymbal 53-Ride Bell 54-Tambourine 55-Splash Cymbal 56-Cowbell 57-Crash Cymbal 2 58-Vibraslap 59-Ride Cymbal 2 60-High Bongo 61-Low Bongo 62-Mute Hi Conga 63-Open Hi Conga 64-Low Conga 65-High Timbale 66-Low Timbale 67-High Agogo 68-Low Agogo 69-Cabasa 70-Maracas 71-Short Whistle 72-Long Whistle 73-Short Guiro 74-Long Guiro 75-Claves 76-Hi Wood Block 77-Low Wood Block 78-Mute Cuica 79-Open Cuica 80-Mute Triangle 81-Open Triangle 82-Shaker 83-Jingle Bell 84-Bell Tree 85-Castinets 86-Mute Surdo 87-Open Surdo