Activity 5 - Use effects to fade in
Now that you have one effect in your song, let’s try to fade in the introduction of our song.
In activity 4, we used
setEffect function to apply an effect to a specific track
for the entire duration of the song, but what if you only want a
specific section of your song to have an effect? Use the
function with more parameters!
effectStartValue: The starting value applied to the parameter
effectStartLocation: The measure at which the starting value is set
effectEndValue: The ending value of the parameter
effectEndLocation: The measure at which the ending value is set
This version of the
setEffect allows for us to perform automation
on a specific piece of our song. Automation is a way to change the value
of an effect over time. One use of automation is to make a song fade in
or fade out. To do so, we must adjust the GAIN
volume in the VOLUME
effectType over time. For example, if we
effectStartValue at -60 db and our
effectEndValue at 0
db, it will sound like our song is fading in over time. To adjust the
starting point and length of the effect, specify the
Add another setEffect function to your song
- Add another
setEffectfunction call into your code, but ensure all 7 parameters are present in the call.
- Set the
- Use the “Every Effect Explained in Detail” reference guide to see which parameters
VOLUMEhas. To adjust the loudness of an audio clip, use the GAIN
- If we want to make something sound like it is fading in, we must have the sound’s volume start at nothing and increase it until around 0 decibels. To do so, set effectStartValue at a very low value, and effectEndValue to be a higher value.
Hint: Volume is measured in decibels. In decibels, the more positive a number is, the louder it gets. Also, try not to exceed 0 decibels.
- Set values for
effectEndLocationto specify when to start and stop the fade in effect.
Your code should now look something like this:
from earsketch import * init() setTempo(120) fitMedia(HOUSE_DEEP_CRYSTALCHORD_001, 3, 1, 5) fitMedia(HOUSE_DEEP_CRYSTALCHORD_002, 3, 5, 9) # Section A def sectionA(startMeasure, endMeasure): fitMedia(RD_UK_HOUSE__AIRYPAD_1, 1, startMeasure, endMeasure) fitMedia(HOUSE_MAIN_BEAT_002, 4, startMeasure, endMeasure) fitMedia(HOUSE_ROADS_BASS_001, 5, startMeasure, endMeasure) # Section B def sectionB(startMeasure, endMeasure): fitMedia(Y37_ORGAN_1, 2, startMeasure, endMeasure) fitMedia(HOUSE_ROADS_BASS_001, 5, startMeasure, endMeasure) fitMedia(RD_UK_HOUSE__ARPLEAD_1, 6, startMeasure, endMeasure) sectionA(1, 9) sectionB(9, 17) sectionA(17, 25) setEffect(2, DELAY, DELAY_FEEDBACK, -6.0) setEffect(2, DELAY, DELAY_TIME, 1200.0) setEffect(0, VOLUME, GAIN, -60, 1, 0, 3) finish()