Voice recording: fading in and out

For a Musical Interval Training app/ITune I’m working on, I have been trying to get a nice sound when speaking the intervals (e.g. “minor second”). One aspect of making it nice is a fade in and fade out to remove the background hiss before the voice cuts in. I’ve put an example on SoundCloud (see link below – the voice is not mine, as any fule doth know) of the after-sound. It’s recorded using the Roland R-05 mentioned elsewhere here, and the recording is edited using Sony SoundForge 10. SoundForge works fine on Windows 10.



Music theory: well-tempered vs equal-tempered










Recording sound from your sound card

On another PC, the SoundMix option in Windows sound options was a reasonable way of recording soundcard (Realtek) output to a wav file. However, that option is not there on my current laptop, which has an NVidia soundcard. Sure I could code something myself… but it looked like the effort was greater than the reward. In the end, I used the combination of 2 pieces of paid-for software, to get a working audio file that I can put on SoundCloud to demo my musical intervals app. Those 2 software packages are:

Soundcast-o-matic, which despite the cheesy name, works great for screen recording, and has a very reasonable subscription model. This allows me to save to .avi, which is recognised by..

Sony Sound Forge Audio Studio 10.0, which though old, works fine on Windows 10… as long as you haven’t lost that precious license key. I can extract the sound from the .avi, and save it as .mp3

In ITunes, I can then add the file, attach to a playlist, specifically for the purpose of burning that to a CD.



Music theory: intervals in PowerShell

Musicians who aren’t programmers: my aim is at the end of this to have an app that will play an interval, ascending or descending, and ask you to identify the interval. It will run as a minimum on a Windows PC. I don’t know OSX or IOS, so it will not run on Apple. The app will also run on Windows Phone, but as I think I am the only person in the world to have one, that may not help you.  For the phone version, as I want to use it in the car, it needs voice recognition as well as Touch. This very short video on YouTube is the extent of what I have right now… it is way off the finished article as you will see, but I like to note all the steps I make on a journey.


While this is perfectly good for a start, it doesn’t quite fit into the random game I thought I would play in the car:

$notes = @{
    GbelowC = 196;
    A      = 220;
    Asharp = 233;
    B      = 247;
    C      = 262;
    CSharp = 277;
    D      = 294;
    DSharp = 311;
    E      = 330;
    F      = 349;
    FSharp = 370;
    G      = 392;
    GSharp = 415; 

[System.Console]::Beep($($notes.C), 1000)
[System.Console]::Beep($($notes.CSharp), 1000)
[System.Console]::Beep($($notes.D), 1000)

More work needed…
And see this MSDN post for Beep in the Framework.



So we need an array of full-on objects:


$newNotes = @()
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “C3”; hertz = [int] 131}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “C3Sharp”; hertz = [int] 139}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “D3”; hertz = [int] 147}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “D3Sharp”; hertz = [int] 156}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “E3”; hertz = [int] 165}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “F3”; hertz = [int] 175}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “F3Sharp”; hertz = [int] 185}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “G3”; hertz = [int] 196}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “G3Sharp”; hertz = [int] 208}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “A3”; hertz = [int] 220}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “A3Sharp”; hertz = [int] 233}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “B3”; hertz = [int] 247}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “C4”; hertz = [int] 262}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “C4Sharp”; hertz = [int] 277}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “D4”; hertz = [int] 294}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “D4Sharp”; hertz = [int] 311}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “E4”; hertz = [int] 330}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “F4”; hertz = [int] 349}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “F4Sharp”; hertz = [int] 370}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “G4”; hertz = [int] 392}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “G4Sharp”; hertz = [int] 415}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “A4”; hertz = [int] 440}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “A4Sharp”; hertz = [int] 466}
$newNotes += New-Object -TypeName PSObject -Property @{noteName = “B4”; hertz = [int] 494}
foreach ($note in $newNotes ) {
[System.Console]::Beep($($note.hertz), 1000)

Actually, the low quality of Console.Beep makes it unusable for this. This is much better (credit here – I could not have done the maths off the bat):

using System;
using System.Windows.Forms;
using System.IO;
using System.Media;
using System.Collections.Generic;
namespace WindowsFormsApplication1 {
    public partial class Form1 : Form {
        public Form1() {
        private void button1_Click(object sender, EventArgs e) {
            var notes = new List<int>{
                60, 131, 139, 147, 156, 165, 175, 185, 196, 208, 220, 23, 247,
                262, 277, 294, 311, 330, 349, 370, 392, 415, 440, 466, 494 };
            foreach (var note in notes) {
                Beep.BeepBeep(1000, note, 1000);
    public class Beep {
        public static void BeepBeep(int Amplitude, int Frequency, int Duration) {
            double A = ((Amplitude * (Math.Pow(2, 15))) / 1000) - 1;
            double DeltaFT = 2 * Math.PI * Frequency / 44100.0;
            int Samples = 441 * Duration / 10;
            int Bytes = Samples * 4;
            int[] Hdr = { 0X46464952, 36 + Bytes, 0X45564157, 0X20746D66, 16, 0X20001, 44100, 176400, 0X100004, 0X61746164, Bytes };
            using (MemoryStream MS = new MemoryStream(44 + Bytes)) {
                using (BinaryWriter BW = new BinaryWriter(MS)) {
                    for (int I = 0; I < Hdr.Length; I++) {
                    for (int T = 0; T < Samples; T++) {
                        short Sample = System.Convert.ToInt16(A * Math.Sin(DeltaFT * T));
                    MS.Seek(0, SeekOrigin.Begin);
                    using (SoundPlayer SP = new SoundPlayer(MS)) {


just found this

And this video is a good primer on sound and frequency.

Music theory: interval training

And of course everyone says it’s about the mnemonics.

interval number of semitones ascending example descending example
Minor 2nd 1 Jaws Jaws
Joy to the World
Major 2nd 2 Happy Birthday
Norwegian Wood
Friday – Rebecca Black (see below)
Minor 3rd 3 The Impossible Dream
Smoke on the water
Hey Jude
Major 3rd 4 Oh When the Saints
Do (a) Deer
Perfect 4th 5 Here Comes the Bride
Born Free
Tritone / Diminished 5th
/ Augmented 4th
6 Maria (West Side Story)  n/a ?
Perfect 5th 7 Twinkle Twinkle Little Star
Do You Hear What I Hear?



Minor 6th 8 The Entertainer Love Story Theme
Major 6th 9 My Bonnie Lies Over the Ocean

My Way

Sweet Caroline

Man in the Mirror

Minor 7th 10 Twinkle Twinkle Little Star
The winner takes it all
There’s a Place For Us (Somewhere)
An American in Paris
Major 7th 11  Bali H’ai

The Winner takes it all

Octave 12 Somewhere Over the Rainbow

Hi-Ho (introductory bit – Snow White)

 There’s No Business Like Show Business

This person has done something pretty useful – making a Spotify list to illustrate some intervals.

Woh! It just gets better.

More up to date songs here.