Explain the usage of the 5 most
important synthesis modules:
Oscillator, Filter, Amplifier,
Envelope, and LFO
Hello
Hello
 Hi! I am Darshil Rathod. This is my sixth assignment
for “Introduction and Music Production” at
Coursera.org
Hello
 Hi! I am Darshil Rathod. This is my sixth assignment
for “Introduction and Music Production” at
Coursera.org
 I w...
Introduction
Introduction
 To produce an original sound, a synthesizer uses
several units or modules of generation and sound
processin...
Introduction
 We are going to study the usage of the 5 most
important synthesis modules:
Introduction
 Oscillator
 Filter
 Amplifier
 Envelope
 LFO
We are going to study the usage of the 5 most
important sy...
Oscillator
Oscillator
 The VCO (Voltage Controlled Oscillator) is
an electrical voltage controlled oscillator.
Oscillator
 The VCO (Voltage Controlled Oscillator) is
an electrical voltage controlled oscillator.
 Its purpose is to g...
Oscillator
 Each waveform has a “sound
personality”, determined by its harmonic
content
Oscillator
 Each waveform has a “sound
personality”, determined by its harmonic
content
Sine Sawtooth Square Triangle
Oscillator
 a sine wave produces a simple clean sound without
harmonic
Oscillator
 a sine wave produces a simple clean sound without
harmonic
 the sawtooth signal for its part contains all ha...
Oscillator
 a sine wave produces a simple clean sound without
harmonic
 the sawtooth signal for its part contains all ha...
Oscillator
 a sine wave produces a simple clean sound without
harmonic
 the sawtooth signal for its part contains all ha...
Filter
Filter
 The VCF (Voltage Controlled Filter) is the
filter section of a synthesizer
Filter
 The VCF (Voltage Controlled Filter) is the
filter section of a synthesizer
 A Filter is used to remove frequenci...
Filter
 The main filter is the Low-Pass Filter
(LPF).
Filter
 The main filter is the Low-Pass Filter
(LPF).
 Low-Pass Filters allows the lower
frequencies to pass through una...
Filter
 Another common filter is the High-Pass
Filter, it does the opposite of a LPF and
allows the higher frequencies to...
Amplifier
Amplifier
 The VCA (Voltage Controlled Amplifier) 's
role is to amplify the signal (preamp)
before output to the external...
Amplifier
 By varying a voltage input, we can change
the amplitude of a signal, making it
quieter and louder by supplying...
Amplifier
 An Amplifier uses an Envelope to control
the overall loudness (or amplitude) of the
sound over time.
Envelope
Envelope
 There are many variations of envelopes
available. However, the most common
envelope has 4 parameters:
Envelope
 There are many variations of envelopes
available. However, the most common
envelope has 4 parameters:
• Attack ...
Envelope
 There are many variations of envelopes
available. However, the most common
envelope has 4 parameters:
 This is...
Envelope
A (Attack): Just after pressing a key, the envelope opens from zero to
full. This is controlled by the attack tim...
Envelope
D (Decay): While the key is still pressed, the envelope drops from full
to the sustain level. This is controlled ...
Envelope
S (Sustain): While the key is still being pressed, the continuing
envelope just remains at the Sustain level. Thi...
Envelope
R (Release): When the key is released, the envelope then drops from
the sustain level to zero. This is controlled...
LFO
LFO
 To modulate is to exert control or affect or
influence or shape.
LFO
 To modulate is to exert control or affect or
influence or shape.
 Modulation is used to breathe more life
into a so...
LFO
 To modulate is to exert control or affect or
influence or shape.
 Modulation is used to breathe more life
into a so...
LFO
 Basically, an LFO is an oscillator working
in a range of subsonic frequencies.
LFO
 Basically, an LFO is an oscillator working
in a range of subsonic frequencies.
 It acts directly on the generator.
LFO
 Basically, an LFO is an oscillator working
in a range of subsonic frequencies.
 It acts directly on the generator.
...
LFO - Examples
LFO - Examples
 To simulate a vibrato effect, the LFO
is modulating at a certain speed the
frequency of the signal from t...
LFO - Examples
 To simulate a vibrato effect, the LFO
is modulating at a certain speed the
frequency of the signal from t...
Reflections
Reflections
 This is my last work for “Introduction to Music
Production”, we’ve learnt a lot of things this last
weeks, a...
Thank you
Thank you
 Thank you for taking the time to read my lesson
Thank you
 Thank you for taking the time to read my lesson
 I hope I was clear and the work I’ve done could be
useful fo...
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the usage of the 5 most important synthesis modules: Oscillator, Filter, Amplifier, Envelope, and LFO.

  1. 1. Explain the usage of the 5 most important synthesis modules: Oscillator, Filter, Amplifier, Envelope, and LFO
  2. 2. Hello
  3. 3. Hello  Hi! I am Darshil Rathod. This is my sixth assignment for “Introduction and Music Production” at Coursera.org
  4. 4. Hello  Hi! I am Darshil Rathod. This is my sixth assignment for “Introduction and Music Production” at Coursera.org  I will be teaching about “Compare and contrast an algorithmic and convolution reverb. Demonstrate the difference and the important features in both types of reverb.”
  5. 5. Introduction
  6. 6. Introduction  To produce an original sound, a synthesizer uses several units or modules of generation and sound processing to create a basic signal, and then change the settings to get the desired tone.
  7. 7. Introduction  We are going to study the usage of the 5 most important synthesis modules:
  8. 8. Introduction  Oscillator  Filter  Amplifier  Envelope  LFO We are going to study the usage of the 5 most important synthesis modules:
  9. 9. Oscillator
  10. 10. Oscillator  The VCO (Voltage Controlled Oscillator) is an electrical voltage controlled oscillator.
  11. 11. Oscillator  The VCO (Voltage Controlled Oscillator) is an electrical voltage controlled oscillator.  Its purpose is to generate a waveform rich in harmonics to allow effective treatment by filtering section.
  12. 12. Oscillator  Each waveform has a “sound personality”, determined by its harmonic content
  13. 13. Oscillator  Each waveform has a “sound personality”, determined by its harmonic content Sine Sawtooth Square Triangle
  14. 14. Oscillator  a sine wave produces a simple clean sound without harmonic
  15. 15. Oscillator  a sine wave produces a simple clean sound without harmonic  the sawtooth signal for its part contains all harmonics of decreasing amplitude and its corespondant is quite soft and copper.
  16. 16. Oscillator  a sine wave produces a simple clean sound without harmonic  the sawtooth signal for its part contains all harmonics of decreasing amplitude and its corespondant is quite soft and copper.  the squared signal contains only odd harmonics of decreasing amplitude. The raw sound a little hollow.
  17. 17. Oscillator  a sine wave produces a simple clean sound without harmonic  the sawtooth signal for its part contains all harmonics of decreasing amplitude and its corespondant is quite soft and copper.  the squared signal contains only odd harmonics of decreasing amplitude. The raw sound a little hollow.  the triangular signal looks like a sine wave rich in harmonics and sound closer to an oboe
  18. 18. Filter
  19. 19. Filter  The VCF (Voltage Controlled Filter) is the filter section of a synthesizer
  20. 20. Filter  The VCF (Voltage Controlled Filter) is the filter section of a synthesizer  A Filter is used to remove frequencies from the waveform so as to alter the timbre.
  21. 21. Filter  The main filter is the Low-Pass Filter (LPF).
  22. 22. Filter  The main filter is the Low-Pass Filter (LPF).  Low-Pass Filters allows the lower frequencies to pass through unaffected and filters out (or blocks out) the higher frequencies.
  23. 23. Filter  Another common filter is the High-Pass Filter, it does the opposite of a LPF and allows the higher frequencies to pass through unaffected and filters out (blocks- out) the lower frequencies.
  24. 24. Amplifier
  25. 25. Amplifier  The VCA (Voltage Controlled Amplifier) 's role is to amplify the signal (preamp) before output to the external amplification.
  26. 26. Amplifier  By varying a voltage input, we can change the amplitude of a signal, making it quieter and louder by supplying a smaller or larger voltage as a control signal.
  27. 27. Amplifier  An Amplifier uses an Envelope to control the overall loudness (or amplitude) of the sound over time.
  28. 28. Envelope
  29. 29. Envelope  There are many variations of envelopes available. However, the most common envelope has 4 parameters:
  30. 30. Envelope  There are many variations of envelopes available. However, the most common envelope has 4 parameters: • Attack time • Decay time • Sustain level • Release time
  31. 31. Envelope  There are many variations of envelopes available. However, the most common envelope has 4 parameters:  This is usually called ADSR Envelope. • Attack time • Decay time • Sustain level • Release time
  32. 32. Envelope A (Attack): Just after pressing a key, the envelope opens from zero to full. This is controlled by the attack time. An attack time of zero means that the envelope goes from zero to full instantly. Increasing the Attack time means that it will happen more slowly.
  33. 33. Envelope D (Decay): While the key is still pressed, the envelope drops from full to the sustain level. This is controlled by decay time. A decay time of zero means that the envelope goes from full to sustain instantly. Increasing the decay time means that this will happen more slowly.
  34. 34. Envelope S (Sustain): While the key is still being pressed, the continuing envelope just remains at the Sustain level. This is set by sustain level.
  35. 35. Envelope R (Release): When the key is released, the envelope then drops from the sustain level to zero. This is controlled by Release time. A release time of zero means that this will happen instantly. Increasing the Release time means that this will happen more slowly.
  36. 36. LFO
  37. 37. LFO  To modulate is to exert control or affect or influence or shape.
  38. 38. LFO  To modulate is to exert control or affect or influence or shape.  Modulation is used to breathe more life into a sound and make it more expressive.
  39. 39. LFO  To modulate is to exert control or affect or influence or shape.  Modulation is used to breathe more life into a sound and make it more expressive.  A Low Frequency Oscillator (LFO) is a very common modulator
  40. 40. LFO  Basically, an LFO is an oscillator working in a range of subsonic frequencies.
  41. 41. LFO  Basically, an LFO is an oscillator working in a range of subsonic frequencies.  It acts directly on the generator.
  42. 42. LFO  Basically, an LFO is an oscillator working in a range of subsonic frequencies.  It acts directly on the generator.  Several settings can be varied and the effect intensity: speed modulation, frequency, waveform used ...
  43. 43. LFO - Examples
  44. 44. LFO - Examples  To simulate a vibrato effect, the LFO is modulating at a certain speed the frequency of the signal from the VCO (Voltage Controlled Oscillator).
  45. 45. LFO - Examples  To simulate a vibrato effect, the LFO is modulating at a certain speed the frequency of the signal from the VCO (Voltage Controlled Oscillator).  Similarly, a tremolo is obtained by modulating the LFO VCA (Voltage Controlled Amplifier) volume.
  46. 46. Reflections
  47. 47. Reflections  This is my last work for “Introduction to Music Production”, we’ve learnt a lot of things this last weeks, a lot of information, so I tried to present the concepts as clearly as possible.
  48. 48. Thank you
  49. 49. Thank you  Thank you for taking the time to read my lesson
  50. 50. Thank you  Thank you for taking the time to read my lesson  I hope I was clear and the work I’ve done could be useful for people without this knowledge

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