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讓音樂播放更簡單——Adafruit Music Maker FeatherWing和Audio FX Sound Board評測

Adafruit    Audio   音頻    Feather    MP3    OGG    播放器    解碼   
  • 作者：邵楠
  • 來源：21ic
  • [導讀]
  • 本文介紹的兩款模塊都很小巧，但功能強大，一款是高集成度的OGG播放器方案，另一款是大家都熟悉MP3解碼方案。此次評測的是Adafruit的兩塊板子：Audio FX Sound Board & Music Maker FeatherWing w/Amp

單個音符播放和停止：

def note_on( ser,key,chan ):

realkey = (key&0x7F)+40

print("key on: %u "% realkey )

midiNoteOn(ser,chan, realkey, 127);

def note_off( ser,key,chan ):

realkey = (key&0x7F)+40

print("key off: %u "% realkey )

midiNoteOff(ser,chan, realkey, 127);

def note_all_off( ser ):

print("key off" )

midiNoteAllOff(ser,0)

播放樂譜的函數(shù)

def play_tone( ser,tone ):

name = input("Push Enter to play!")

print("Song Start")

score_idx = 0

s = 0

sleeptime0 = 0

sleeptime1 = 0

sleeptime = 0

tickcount = 0

chan = 0

while score_idx < len(tone):

sleeptime0 = (tone[score_idx]+tone[score_idx+1]*256)*8/1000

sleeptime = sleeptime0-sleeptime1

sleeptime1 = sleeptime0

print("sleep: %5.2f"%sleeptime)

time.sleep(sleeptime)

note_all_off(ser)

score_idx = score_idx+2

always = 1

while always == 1:

s = tone[score_idx]

score_idx = score_idx+1

if s== EoS:

print("Song End")

return

else:

note_on(ser,s,chan)

if (s&en)!=0:

if tickcount<7:

tickcount=tickcount+1;

else:

tickcount = 0

if chan==0:

chan=1

else:

chan = 0

break;

測試程序

ser = vs1053_midi.vs1053_midi_setup("com5")

#vs1053_midi.test_play_loop(ser,5)

vs1053_midi.play_tone(ser,vs1053_midi.tone)

程序運行如下：

image11.png

image12.png

這些開發(fā)板你一定沒玩過！來開發(fā)板試用中心免費借閱吧~

  • 本文系21ic原創(chuàng)，未經(jīng)許可禁止轉(zhuǎn)載!

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