Thursday, July 31, 2014

Add a software instrument and record MIDI using GarageBand

Hi! I am Jonie Lim from Malaysia. This is my second week assignment for Introduction to Music Production on Coursera. I am choosing the topic to record a MIDI in DAW (Digital Audio Workstation). I am using GarageBand as my DAW. I am using GarageBand 5. Yes, it is a very old version, my Macbook is currently 5 years old. :P

Firstly, I am creating a test project in GarageBand. I set the Count In as the click and countoff (this is what I understand what it is). I also turned on the Metronome so I could follow the tempo of the project that I have set, which is 120.

Setting the Count In and Metronome

Then, I created a new track selecting Software Instrument.

Creating a software instrument track

I have my MIDI controller connected to my Macbook. Got this MIDI controller last year when I have a chance to go to US. Haven't work out anything from it, yet. Thanks to this course, it help me to find ways to play with this! :D

Connecting MIDI controller to DAW

I can select which software instrument to be used from the right menu on the right of GarageBand.

Selecting software instrument

I selected the Planetarium from Synth Basics category. GarageBand will change the track name according to the selection automatically. I still can change the track name before recording. However, whenever a new software instrument selected on the same track, it will be renamed again, automatically.

Selected software instrument for the MIDI track

Finally, I selected the track that I wanted to record to, and click the record button.

Track editor : showing score view

As we know, MIDI is something like a real time score, which can be view in GarageBand right away by showing the track editor. Editing the score actually will change the note played by the software instrument.

You can view it in piano roll as well. See the following screen shot.

Track editor : showing piano roll view

To change the velocity of the note(s) in the MIDI track. Firstly, select the note(s), then go the the left pane of the track editor, modify the velocity of the selected note(s) by scroll to the left or right at the velocity control. From the illustration below, the velocity of the selected note in green is 119.

Track editor : controls

GarageBand provide the quantize function by the "Align to" control, the control at below of the Velocity control. The off to max bar indicates the percentage of quantization mentioned in the lecture.

Track editor : quantize the notes

I mixed down the recording and uploaded the file to SoundCloud. This is the audio file "generated" by the software instrument that I chose in GarageBand in this blog post.

I tried to explore GarageBand on my Macbook, but it seems it is unable to perform some of the tasks mentioned in the lectures, such as colouring the track/recording, cross-fading and etc. That is why I chose this topic to discuss for this assignment. I am thinking of upgrade it, or download Audacity to proceed with this course. Probably this would help me more with my future recordings too! ;)

Thank you for taking your time to go through this blog post. Hope you enjoy reading it, as I enjoyed preparing for this. Have a great day!

Thursday, July 24, 2014

Type and Usage of Important Studio Cables

Hi, I am Jonie Lim from Malaysia. This is an assignment from a course that I am currently taking in Coursera, Introduction to Music Production. I will be sharing about the type and usage of some of the studio cables that normally used. I wanted to do this in video format, but I guess I would do this better as a blog post.

In a more specific terminology, the word "cable" actually refer to the cord or wire that is used to connect an input device and an output device. However, what we are discussing here about the studio cables that are more focusing to the connectors that act like an interface between the cord/wire with the input/output devices.

There are 2 categories of type discussed here. One is balanced cable or unbalanced cable, the other category is analog or digital cable.

XLR cable

XLR cable normally used for professional audio applications, such as microphones. The end points of this cable has a male and female XLR connectors, which has three pins or three holes respectively. There three contacts are for common/ground, positive and negative versions of the signal. This make the XLR cables for balanced connection. This is good for long distance audio signal transmission without signal loss. This is for transmitting analog signal.

Picture: "Xlr-connectors". Licensed under CC BY-SA 3.0 via Wikimedia Commons.

TS cable

TS 0.25inch mono plug.jpg
TS cable commonly used for connecting to guitar and keyboard for line in/out. T stands for tip, and S stands for sleeve. It is a 2-contact connector, one for common/ground signal, and the other contact is for the audio signal. It has part of its audio signal to be carried through the ground, thus it is an unbalanced cable. This is for transmitting analog signal.

Picture: "TS 0.25inch mono plug" by Mataresephotos - Own work. Licensed under CC BY 3.0 via Wikimedia Commons.

TRS cable

Compared to TS cable, TRS cable has an additional contact, R (stands for ring), which allow TRS cable to work in 2 modes. (1) As unbalanced cable for stereo audio signal connection, (2) as balanced cable for mono audio signal connection. TRS cable commonly used for PC line in/out or phone jack as for stereo signal transmission, guitar/keyboard as mono signal transmission. Again, this is for transmitting analog signal.

Picture: "Audio-TRS-Mini-Plug" by Evan-Amos - Own work. Licensed under Public domain via Wikimedia Commons.

MIDI cable

Midi ports and cable.jpg
A midi cable usually have a three or five conductors, a common/ground wire, and a balanced pair of conductors. This commonly can be found on a digital piano or a keyboard. It is also widely used for synthesizer as a MIDI controller. It is transmitting a MIDI signal, which is in digital format. This MIDI format data can be differs from what you hear from keyboard when it is played on a computer. When I used this cable, I found out the in/out label on my digital piano actually should be connected reversely to MIDI cable to work properly.

Picture: "Midi ports and cable" by :en:Pretzelpaws with a Canon EOS-10D camera. Cropped 2/9/05 using the GIMP. - en:Image:Midi_ports_and_cable.jpg. Licensed under CC BY-SA 3.0 via Wikimedia Commons.

RCA cable

RCA cable is commonly used to carry both audio and video signal. This is commonly used for consumer appliances. However, this is can be the only available option for a budgeted music gear. This can be used for both analog and digital audio signal transmission. for digital audio, the cables must meet the S/PDIF specification. I do have RCA cable, but I do not have an interface to control the gain to the line level that my PC can "listen".

Picture: "Composite-cables" by Evan-Amos - Own work. Licensed under Public domain via Wikimedia Commons.

USB cable

USB cable is one of the common connector used to connect to a PC. For example, one of the cable end can be of MIDI connector, and the other end is USB connector. The digital data probably doesn't required a "balanced" method to ensure no data loss, thus this is not categorized in balanced/unbalanced cable.

Picture: "USB-Connector-Standard" by Evan-Amos - Own work. Licensed under CC0 via Wikimedia Commons.

Firewire cable

FireWire800 Stecker.jpeg
Firewire cable is similar to USB cable, but it is using a different standards and interface. This is intended for high-speed communication, however, it is not that popular in computer recording compared to USB cable. Just as USB cable, Firewire cable is used to connect the audio interface to the computer. It is transmitting signal in digital format.

Picture: "FireWire800 Stecker" by --Fadi 10:48, 27. Mai 2010 (CEST). Original uploader was Fadi at de.wikipedia - Transferred from de.wikipedia; transferred to Commons by User:Wdwd using CommonsHelper.
(Original text : selbst fotografiert). Licensed under CC BY-SA 3.0 via Wikimedia Commons.

This summarize of the type and usage of important studio cables as below.

Cable Type Usage
XLR cable
  • Balanced cable
  • Analog audio
To connect to microphones and for balanced signal transfer. 
TS cable
  • Unbalanced cable
  • Analog audio
To connect to guitar/keyboard.
TRS cable
  • Can be both balanced cable or unbalanced cable
  • Analog audio
To connect to guitar/keyboard in balanced mode, and to connect to PC or handset in unbalanced mode.
MIDI cable
  • Balanced cable
  • Digital audio
To connect to keyboards/piano or a synthesizer.
RCA cable
  • Unbalanced cable
  • Can for both analog and digital audio
To connect to guitar/keyboard in balanced mode, and to connect to PC or handset in unbalanced mode.
USB cable
  • Digital signal
Mainly used to connect to a computer.
Firewire cable
  • Digital signal
Mainly used to connect to a computer.

Taken some photos on my audio cables. Here they are :

A note on the TRS cable and stereo cable here. The quarter inch TRS' usage is like what described can be used as a balanced mono or unbalanced stereo cable. The 3.5mm stereo cable usually used as an unbalanced stereo cable. Hence the name, stereo cable. :)

Hopefully this post gives an overview of the type and usage of important studio cables.