Audio storage, stereo switching
#3
First of all, sorry for the confusion, the above method of saving audio only works in older versions. I looked into it and here's a way to save the audio generated by the program, this time as WAV, 8 bit, stereo. But if you configure _NewSound differently and then put the correct resampling in the _NewSound field, of course you can save it in better quality (16 bit stereo or 32 bit stereo, SndStereoSave can handle that. The only thing I couldn't debug is the popping at the end in the saved file. I'll solving it later, but if someone beats me to it, I'll be happy Smile

Code: (Select All)
'SOUND created in Phoenix and then saved as WAV

t = 0
tmp$ = "Sample = ##.#####   Time = ##.#####"
Locate 1, 60: Print "Rate:"; _SndRate

'------ modification -------
Dim SNDREC(_SndRate * 3.00239) As _Unsigned _Byte 'sound duration is 3,1 seconds, use _unsigned _byte for 8 bit record
'------ modification -------
'fill SNDREC array with zeros (silent)
For silent = 0 To UBound(SNDREC)
    SNDREC(silent) = 0~%
Next
Print "Phoenix generate sound..."
Do
    'queue some sound
    Do While _SndRawLen < 0.1 'you may wish to adjust this
        sample = Sin(t * 440 * Atn(1) * 8) '440Hz sine wave (t * 440 * 2Ď€)
        sample = sample * Exp(-t * 3) 'fade out eliminates clicks after sound

        '------ modification -------
        SNDREC(rec) = 127 * sample + 128 ' recalculate samples for 8 bit record
        rec = rec + 1
        '------ modification -------

        _SndRaw sample
        t = t + 1 / _SndRate 'sound card sample frequency determines time
    Loop

    'do other stuff, but it may interrupt sound
    Locate 1, 1: Print Using tmp$; sample; t
Loop While t < 3.0 'play for 3 seconds

Do While _SndRawLen > 0 'Finish any left over queued sound!
Loop

Print "Phoenix save this sound as 8 bit stereo WAV file Ding.Wav"

'------ modification -------

Dim LR As _MEM
NewSound = _SndNew(_SndRate * 3.1, 2, 8) 'create stereo 8 bit snd record
LR = _MemSound(NewSound, 0)

Dim REC As _Unsigned _Byte
'because created sound is MONO but we recording it as stereo, create here pseudo stereo directly to created empty stream:

done = 0
Do Until done = UBound(SNDREC)
    REC = SNDREC(done)
    _MemPut LR, LR.OFFSET + RECINDEX, REC 'left
    _MemPut LR, LR.OFFSET + RECINDEX + 1, REC 'right
    done = done + 1
    RECINDEX = RECINDEX + 2 'switch by 2 bytes in LR MEM array (because its 8 bite per record = 1 byte for left and 1 byte for right channel)
Loop



Print "Saving sound as ding.wav..."
SndStereoSave LR, "Ding.wav"
Print "Phoenix play saved 8 bit file Ding.wav"
_SndPlayFile "Ding.wav"
End




Function ConvertOffset&& (value As _Offset)
    $Checking:Off
    Dim m As _MEM 'Define a memblock
    m = _Mem(value) 'Point it to use value
    $If 64BIT Then
            'On 64 bit OSes, an OFFSET is 8 bytes in size.  We can put it directly into an Integer64
            _MEMGET m, m.OFFSET, ConvertOffset&& 'Get the contents of the memblock and put the values there directly into ConvertOffset&&
    $Else
        'However, on 32 bit OSes, an OFFSET is only 4 bytes.  We need to put it into a LONG variable first
        _MemGet m, m.OFFSET, temp& 'Like this
        ConvertOffset&& = temp& 'And then assign that long value to ConvertOffset&&
    $End If
    _MemFree m 'Free the memblock
    $Checking:On
End Function


Sub SndStereoSave (arr As _MEM, file As String)
    Type head16
        chunk As String * 4 '       4 bytes  (RIFF)
        size As _Unsigned Long '              4 bytes  (file size)  velikost souboru
        fomat As String * 4 '       4 bytes  (WAVE)
        sub1 As String * 4 '        4 bytes  (fmt )
        subchunksize As Long '      4 bytes  (lo / hi), $00000010 for PCM audio
        format As Integer '         2 bytes  (0001 = standard PCM, 0101 = IBM mu-law, 0102 = IBM a-law, 0103 = IBM AVC ADPCM)
        channels As Integer '       2 bytes  (1 = mono, 2 = stereo)
        rate As Long '              4 bytes  (sample rate, standard is 44100)
        ByteRate As Long '          4 bytes  (= sample rate * number of channels * (bits per channel /8))
        Block As Integer '          2 bytes  (block align = number of channels * bits per sample /8)
        Bits As Integer '           2 bytes  (bits per sample. 8 = 8, 16 = 16)
        subchunk2 As String * 4 '   4 bytes  ("data")  contains begin audio samples
        lenght As _Unsigned Long '            4 bytes  Data block size
    End Type '                     44 bytes  total

    Dim H16 As head16
    ch = FreeFile

    H16.chunk = "RIFF"
    H16.size = 44 + ConvertOffset(arr.SIZE)
    H16.fomat = "WAVE"
    H16.sub1 = "fmt "

    H16.subchunksize = 16

    H16.format = 1
    H16.channels = 2
    H16.rate = _SndRate

    Select Case SNDGetBites(arr)
        Case 1, 2: H16.Bits = 32
        Case 3: H16.Bits = 16
        Case 4: H16.Bits = 8
    End Select

    H16.ByteRate = (_SndRate * 2 * H16.Bits) / 8
    H16.Block = (2 * H16.Bits) / 8

    H16.subchunk2 = "data"
    H16.lenght = ConvertOffset(arr.SIZE)
    If _FileExists(file$) Then Kill file$

    Audio$ = Space$(ConvertOffset(arr.SIZE))
    If SNDGetBites(arr) = 1 Then 'convert values from SINGLE to LONG values, because Marena from the cowshed said it should be like that :)    /Czech Joke/
        Dim A As _MEM, VS As Single, VL As Long
        A = _MemNew(arr.SIZE)
        Do Until done& = arr.SIZE
            VS = _MemGet(arr, arr.OFFSET + done&, Single)
            VL& = 2147483648 * VS
            _MemPut A, A.OFFSET + done&, VL&
            done& = done& + 4
        Loop
        _MemGet A, A.OFFSET, Audio$
        _MemFree A
    Else
        _MemGet arr, arr.OFFSET, Audio$
    End If
    Open file$ For Binary As #ch
    Put #ch, , H16
    Put #ch, , Audio$
    Audio$ = ""

    Close ch
End Sub

Function SNDGetBites (handle As _MEM)
    Select Case handle.TYPE
        Case 260: SNDGetBites = 1 ' 32-bit floating point SINGLE
        Case 132: SNDGetBites = 2 ' 32-bit integer LONG
        Case 130: SNDGetBites = 3 ' 16-bit integer INTEGER
        Case 1153: SNDGetBites = 4 ' 8-bit unsigned integer
    End Select
End Function

Function SndChannels~%% (handle As Long)
    Dim SampleData As _MEM
    ' Check if the sound is valid
    SampleData = _MemSound(handle, 0)
    If SampleData.SIZE = 0 Then
        Print "SndChannels: MemSound return ZERO for audio data size!"
        Exit Function
    End If

    ' Check the data type and then decide if the sound is stereo or mono
    Select Case SampleData.TYPE
        Case 260 ' 32-bit floating point
            If SampleData.ELEMENTSIZE = 4 Then
                SndChannels = 1
            ElseIf SampleData.ELEMENTSIZE = 8 Then
                SndChannels = 2
            End If
        Case 132 ' 32-bit integer
            If SampleData.ELEMENTSIZE = 4 Then
                SndChannels = 1
            ElseIf SampleData.ELEMENTSIZE = 8 Then
                SndChannels = 2
            End If
        Case 130: ' 16-bit integer
            If SampleData.ELEMENTSIZE = 2 Then
                SndChannels = 1
            ElseIf SampleData.ELEMENTSIZE = 4 Then
                SndChannels = 2
            End If
        Case 1153: ' 8-bit unsigned integer
            If SampleData.ELEMENTSIZE = 1 Then
                SndChannels = 1
            ElseIf SampleData.ELEMENTSIZE = 2 Then
                SndChannels = 2
            End If
    End Select
    _MemFree SampleData
End Function


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Messages In This Thread
Audio storage, stereo switching - by Petr - 02-18-2023, 09:21 PM
RE: Audio storage, stereo switching - by Petr - 02-20-2023, 08:26 PM



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