unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ComCtrls, MMSystem, StdCtrls, ExtCtrls;

type
  TData16 = array [0..127] of smallint;
  PData16 = ^TData16;
  TPointArr = array [0..127] of TPoint;
  PPointArr = ^TPointArr;
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    RichEdit1: TRichEdit;
    Edit1: TEdit;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
    procedure OnWaveIn(var Msg: TMessage); message MM_WIM_DATA;
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

var
  WaveIn: hWaveIn;
  hBuf: THandle;
  BufHead: TWaveHdr;
  bufsize: integer;
  p: PPointArr;
  stop: boolean = false;
  z: integer;

procedure TForm1.OnWaveIn;
var
  data16: PData16;
begin
  sleep(z);  {выставляем промежутки времени}
  data16 := PData16(PWaveHdr(Msg.lParam)^.lpData);
  RichEdit1.Lines.Add(IntToStr(data16[0]));
  if stop then
    WaveInAddBuffer(WaveIn, PWaveHdr(Msg.lParam), SizeOf(TWaveHdr))
  else
    stop := true;
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  header: TWaveFormatEx;
  BufLen: word;
  buf: pointer;
begin
  z:= StrToInt(Edit1.Text);
  RichEdit1.Clear;
  BufSize := 1; { Размер буфера }
  with header do
  begin
    wFormatTag := WAVE_FORMAT_PCM;
    nChannels := 1; { количество каналов }
    nSamplesPerSec := 22050; { частота }
    wBitsPerSample := 16; { 8 / 16 бит }
    nBlockAlign := nChannels * (wBitsPerSample div 8);
    nAvgBytesPerSec := nSamplesPerSec * nBlockAlign;
    cbSize := 0;
  end;
  WaveInOpen(Addr(WaveIn), WAVE_MAPPER, addr(header),
  Form1.Handle, 0, CALLBACK_WINDOW);
  BufLen := header.nBlockAlign * BufSize;
  hBuf := GlobalAlloc(GMEM_MOVEABLE and GMEM_SHARE, BufLen);
  Buf := GlobalLock(hBuf);
  with BufHead do
  begin
    lpData := Buf;
    dwBufferLength := BufLen;
    dwFlags := WHDR_BEGINLOOP;
  end;
  WaveInPrepareHeader(WaveIn, Addr(BufHead), sizeof(BufHead));
  WaveInAddBuffer(WaveIn, addr(BufHead), sizeof(BufHead));
  GetMem(p, BufSize * sizeof(TPoint));
  stop := true;
  WaveInStart(WaveIn);
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  if stop = false then
    Exit;
  stop := false;
  while not stop do
    Application.ProcessMessages;
  stop := false;
  WaveInReset(WaveIn);
  WaveInUnPrepareHeader(WaveIn, addr(BufHead), sizeof(BufHead));
  WaveInClose(WaveIn);
  GlobalUnlock(hBuf);
  GlobalFree(hBuf);
  FreeMem(p, BufSize * sizeof(TPoint));
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  Button2.Click;
end;

end.