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Showing posts from August, 2014

Usage of the 5 most important synthesis modules

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Hello there. I am Jonie Lim from Malaysia. This is the final assignment from Introduction to Music Production on Coursera. For this week, I am choosing the topic of explain the usage of the 5 most important synthesis modules.

Let me further break these 5 modules into 2 categories, the primary modulation and the secondary modulation. The oscillator, filter and amplifier are of primary modulation. They work directly on the sound that we will hear. The secondary modulation includes the LFO and envelope, which will modulate the primary modulation during the audio signal manipulations.

Primary modulation
Oscillator is also known as VCO, voltage controlled oscillator. The main functino of this module is to create the sound. It creates the sound with a timbre based on the waveform selected in the synthesizer. Sine wave is normally giving a single frequency range, triangle and square waveform will have the fundamental plus the odd harmonics, while sawtooth waveform will gives fundamental plus …

Flanger vs Phaser

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Hello there! I am Jonie Lim from Malaysia. This is the 5th week assignment for Introduction to Music Production on Coursera. This week topic is very tough for me, I'll try my best to explain how short delay effects, i.e. flanger and phaser function.

Firstly, as usual, let's listen to the original guitar sound which I have pre-recorded. Warning: I am not a good guitar player. :P



My workspace.


In order try to show the difference between the flanger and the phaser, I have the parameters set similarly.



Note that I have both set to the highest intensity to make sure the effect is significantly audible. Next, I set both speed to 0.5Hz. This is the low frequency used to modulate the signals. The flanger can have the feedback set to be inverted or normally here. Since the phaser cannot have it set inverted, thus I have both of them set to 50%, and the feedback of flanger is set towards normal feedback.

Next, let's look at some technical aspects of the 2 audio effects.

A flanger i…

Noise Gate

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Hi! I am Jonie Lim from Malaysia. In this week 4 assignment, I would like to dive in the noise gate plugin. I have a very simple "studio" setup, a MacBook, itself. I don't have a mic or special room to do recording, thus accoustic noise is my #1 concern in recording. In this blog post, I'll be using one of my previous recordings to demonstrate how to use the noise gate. I am using GarageBand 5 for this assignment.




This is the audio waveform from the small purple recording that is splited and copied out from the original recording. To hear the contrast, the effects or plugin that I have put on that track are removed.

This is the original recording sounds like. You hear a "click" sound at 0:04 going into 0:05, and also notice the significant noise right after the singing phrase.







Look at the audio waveform, the "click" sound is highlighted. To get rid of the noise and also the unintentional "click" sound, we can use a noise gate plugin to f…

Audio effects

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Hi! I am Jonie Lim from Malaysia. In this blog post, I would like to talk about the audio effects. This would be my 3rd week assignment for Introduction to Music Production.

Basically, there are 3 major categories of audio effects, which related to the 3 properties of sound. I am going to take a plugin for each category, and explain how these plugins work in GarageBand 5.

I have recorded a singing on 4 notes and export to mp3 with no audio effect being applied.


You can listen it here.



1. Dynamic Effects Dynamic effects play with the amplitude of the sound. One of the plugins that put manipulate amplitute of the sound is compressors. Basically, a compressor would "squeeze" an audio signal when it rises above a specific threshold level. In GarageBand, it would then take the setting of ratio for the strength of the compression, attack setting for when the compressor should react to the signal breaching the threshold, and then the gain setting to set the loudness of the effect t…