Selanjutnya salin program berikut ini, selamat berkreasi
'Membuat Beat Box Drummer dengan Visual Basic 6
Option Explicit
Dim OneSample As Double
Dim DX As New DirectX8 ' menggunakan directx 8
Dim DS As DirectSound8
Dim Bass As DirectSoundSecondaryBuffer8
Dim Snare As DirectSoundSecondaryBuffer8
Dim Hat As DirectSoundSecondaryBuffer8
Dim desc As DSBUFFERDESC
Const PI = 3.14159265358979 '
Const SRATE = 44100 ' Kecepatan Sample / sampling rate
Const DUR = 1 ' Durasi suara
Const FREQ = 440 ' referensi frekuensisuara
Const CHAN = 2 ' stereo
Const BITDEPTH = 16 ' 16 bit
Const BLOCK = 4
Dim hitung As Long
Dim sbuf(0 To DUR * SRATE * CHAN) As Integer
Private Sub Form_Load()
Set DX = New DirectX8 ' menggunkan directx 8
Set DS = DX.DirectSoundCreate("")
DS.SetCooperativeLevel Me.hWnd, DSSCL_NORMAL
desc.fxFormat.nFormatTag = WAVE_FORMAT_PCM ' header audio wav
desc.fxFormat.nSize = 0
'desc.fxFormat.lExtra = 0
desc.fxFormat.nChannels = CHAN
desc.fxFormat.lSamplesPerSec = SRATE
desc.fxFormat.nBitsPerSample = BITDEPTH
desc.fxFormat.nBlockAlign = BLOCK
desc.fxFormat.lAvgBytesPerSec = BLOCK * SRATE
desc.lFlags = DSBCAPS_STATIC Or DSBCAPS_CTRLVOLUME Or DSBCAPS_CTRLFREQUENCY Or DSBCAPS_CTRLPAN
desc.lBufferBytes = BLOCK * DUR * SRATE
'Set Bass = DS.CreateSoundBuffer(desc) ' membuat buffer
Dim i ' pembuatan frekuensi suara
Dim n, n2, n3, x
Dim env As Double
mksoundata 50, -30, 0.1, 40, 4, 0.1, 0.15, Bass, "Saw"
mksoundata 350, -250, 0.2, 100, 0, 0, 0.1, Snare, "Square"
mksoundata 18000, -10, 0.5, 7500, 0, 0.1, 0.1, Hat, "Noise"
End Sub
Private Sub Timer1_Timer()
If hitung = 0 Or hitung = 8 Or hitung = 16 Or hitung = 56 Or hitung = 88 Or hitung = 80 Then
Bass.SetVolume -10000
If Bass.GetStatus = DSBSTATUS_PLAYING Then Bass.Stop: Bass.SetCurrentPosition 0
Bass.SetVolume -1000
Bass.Play 0
End If
If hitung = 32 Or hitung = 96 Or hitung = 120 Then
Snare.SetVolume -10000
If Snare.GetStatus = DSBSTATUS_PLAYING Then Snare.Stop: Snare.SetCurrentPosition 0
Snare.SetVolume -1500
Snare.Play 0
End If
If hitung = 0 Or hitung = 16 Or hitung = 32 Or hitung = 48 Or hitung = 64 Or hitung = 80 Or hitung = 96 Or hitung = 104 Or hitung = 112 Then
Hat.SetVolume -10000
If Hat.GetStatus = DSBSTATUS_PLAYING Then Hat.Stop: Hat.SetCurrentPosition 0
Hat.SetVolume -1500
Hat.Play 0
Hat.SetPan 0
End If
hitung = hitung + 1
If hitung > 128 Then hitung = 0
End Sub
Private Sub mksoundata(f1 As Integer, swp1 As Integer, stime1 As Single, _
f2 As Integer, swp2 As Integer, stime2 As Single, _
dec As Single, Buff As DirectSoundSecondaryBuffer8, Optional waveform As String = "Sine")
Dim i, shift1, shift2, n, n2, n3, env, wavelength
'Dim Buff As New DirectSoundSecondaryBuffer8
env = 1
wavelength = SRATE / f1
For i = 0 To DUR * SRATE - 1
n = 2 * PI * ((f1 + shift1) * i / SRATE)
'n2 = 2 * PI * ((f2 + shift2) * i / SRATE)
env = IIf(i < dec * SRATE, 1 - (i / (dec * SRATE)), 0)
shift1 = IIf(i < dec * SRATE, swp1 * (i / (dec * SRATE)), 0)
shift2 = IIf(i < dec * SRATE, swp2 * (i / (dec * SRATE)), 0)
Select Case waveform
Case "Sine" ' gelombang sinus -- sin(n)
OneSample = Sin(n + Sin(n + Sin(n + Sin(n)))) * env ' frekunsinya sudah dimodulasi
Case "Square"
OneSample = Sgn(Sin(n)) * env
Case "Saw"
OneSample = ((i Mod wavelength) / wavelength) * env
Case "Triangle"
OneSample = Abs(1 - ((i Mod wavelength) / wavelength) * 2) * env
Case "Noise"
OneSample = (Rnd - Rnd) * env
End Select
sbuf(2 * i) = OneSample * 32767 * 0.55 * env ' chanel kiri
sbuf(2 * i + 1) = sbuf(2 * i) ' chanel kanan copy dari chanel kiri
Next i
Set Buff = DS.CreateSoundBuffer(desc)
Buff.WriteBuffer 0, BLOCK * DUR * SRATE, sbuf(0), DSBLOCK_DEFAULT 'mengisi buffer
End Sub