Archive for the ‘assignments’ Category

Xing and my robots

Friday, December 21st, 2007

I don’t have too much to add in terms of progress on my instruments Freddy and Teddy.

As you all know, Teddy lost his life on the way to the performance. I was excited to share his sound with everyone. I had recently learned how to loop his sounds and create a few new ones by touching certain points on his board. Unfortunately, I can’t post and samples because he is dead. I do plan on bringing him back to life though, so that is good.

I played Teddy at the performance and it actually worked out better than I had expected. I was worried that our song wouldn’t sound right because we had practiced it all along with Teddy. But, Freddy stepped up to the plate and did a great job. I had a great time performing and wish we could do a few more events…

Here are a few pictures of Xing from the performance. Thanks for a great class. I learned a lot and had a great time. You all made some really cool instruments.

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knapp jabberbox.03

Friday, December 21st, 2007

interference

‘last of the super sine wave generators’

This instrument uses two microchips, both are a Intersil ICL8038. The controlled with a resistance duty cycle and can produce sin, square or triangle waves. For the purpose of this project I was just using sine waves. I purchased these microchips after doing research into making a wein bridge oscillator which was invented in 1891 by Max Wien, also the inventor of the “Löschfunkensender”.

At this point I am hoping to miniaturize the project and organize the functionality better – that and figure out how to play it. Here is a recording with added phaser:
test recording

Naming History:
4. knapp jabberbox.03
3. Sine Wave Interference Synthesizer (SWIS)
2. knapp electrobox01
1. The Knapp Electric Questioner

more photos

Sky Slide Guitar

Thursday, December 20th, 2007

ssguitar

Material: wood, metal slice, screw, iron box, attached mic, jack, metal guitar strings, tuners, paint

This is a slide guitar with a slide rod on a track. It can switch pitch easily by moving the slide and be connected to an amplifier. The total cost is about 10 dollars.

back original
original appeareance

Test Video
Sound sample01
Sound sample02

homework for final class, dec 21

Thursday, December 13th, 2007

I hate to do this to you, but besides the big concert I’ve got one more bit of homework for you: post final documentation of your instrument. I want detailed descriptions, photos, and sound samples or video! Due Sunday Dec. 23 – but really, you ought to try to get it done before then. If you have already posted detailed documentation, you can link to the older post and describe what’s changed in the final month of the class.

In class dec 21: we’ll eat snacks and make noise.

p.s. for the performance on Sunday, please make sure to bring fresh batteries and any audio cables you might need!

Glendon’s Tape-drum machine

Friday, November 16th, 2007

I am building a machine that will be able to play multiple pre-recorded samples from audio tape attached to the outside of a rotating cylinder. In concept this is something like a mellotron which is a keyboard that plays a different tape for each key. On the Mellotron the samples were typically the same sound at a different pitch for each key. My machine will not have a keyboard but instead a tape head that can be slid back and forth to rest on different tape samples. The different samples will probably consist of different pitches but will probably have various sound sources. One note might be a violin, the next a singing voice. Some of the tracks may have beats but these will probably have to be made up of bits of tape arranged in a regularly spaced pattern rather than a prerecorded beat on a continuous tape because the physical length of the beat on the tape would have to exactly match the circumference of the cylinder.

the machine:
glendon’s machine
Mechanically the machine is coming along fine. The cylinder is rotating on its axle. The motor is mounted and driving the cylinder via a rubber belt. The tape head is mounted on a small swing arm that slides back and forth across the surface of the drum. The little arm swings freely up and down so that gravity will keep it in contact with the surface of the drum. The user will slide it back and forth to select the tape. I am mounting the entire mini-cassette player that I took the head out of on the machine since I don’t want to figure out which parts of the circuitry are needed and which aren’t.

the tape head/arm:
tape head

Three important things remain to work out.

1. I need to make a speed control. Currently it’s running on a cell phone tranformer which gives a very
steady 5.2 VDC. The motor can run on up to 12VDC, maybe more. I need to get a higher voltage tranformer and put a simple voltage divider with a potentiometer to give me variable speed control. This is going to be important because if this thing will have any possiblity for expressive performance, it will probably come from having subtle and sensitive speed control. I will probably run it through a (homemade) volume pedal as well for a little extra performance control.

2. I need to record the content, the actual sounds. This is obviously going to have the largest effect on the ultimate sound of the machine. If I can lay my hands on a reel to reel taper recorder I hope to try that out in order to get wider and perhaps higher output tracks on the tape. The recorded tracks on a cassette are extremely narrow. There are actually 4 tracks on a tape abut 1/4” wide. I think a two track ¼” tape such as most reel to reels would make it easier to really get the head over the recorded sound.

The choice of sounds is more of a question at this point. I plan to record the sounds myself but some of them could be samples of existing music.

3. I need to figure out the best way to attach pieces of tape to the surface of the drum. I’m thinking of spray mount.

Some technical details:

The motor is a “gear head motor” which is like a normal DC motor but with a gear assembly that reduces the RPMs. This is an excellent type of motor for many applications because it delivers much more power at a more useful speed. Most DC motors run at hundreds or thousands of RPMs. Motors with gear reduction can run at much lower speeds. I got mine on eBay. Its range is between 100 and 200 RPMs.

For the drive belt I used a piece of a bicycle inner tube. Inner tubes are a great resource for any type of rubber belt or band. Cross sections make a very strong and super-durable rubber band of whatever width is needed. Using a tire patching kit, any strip of inner tube can be glued to itself to form a longer band of whatever size (not as strong as a cross section).

Initial Step: Building Drums

Friday, November 16th, 2007

Hi,

Just posting my first step towards making drums…

I went to home-depot on 23rd street , bought an empty paint bucket and a silicon-2 XST (paintable formula). It basically dries and gives a feel of hardened rubber ( No I am not crazy , just that I wanted to get the feel of tabla and for that it was important to have this..:-))

Here are few pictures of me trying out my new formula..:-)

Enjoy!!!..

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I hope this works…!!!!

My Robots

Thursday, November 15th, 2007

Hello all,

As you know, my instruments are my two little robots named Freddy and Teddy.

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Shown below is Freddy and my dog Penny. (not sure why they are sideways, the editor is giving me a hard time) He is an older robot with a highly integrated circuit board and therefore I couldn’t get much actual bending accomplished with him. So instead, I am using a potentiometer to distort his sounds to create very interesting new ones. Freddy can say every letter in the alphabet, tell time, use a cell phone, tie his shoe, cross the street and sing a song. He can also store a sequence of numbers and say them back to you if you use his cell phone. He is smart.

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Below is Teddy a modern talking robot with an LED screen. Teddy is bilingual and can speak English and Spanish. He can count, go through the alphabet and sing a silly song. I was able to bend Teddy’s sound by pressing on the circuit board with a screwdriver as shown. I can control the pitch and distort the sound a bit.

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Unfortunately, I misplaced my guitar cable so I can’t connect these guys to my computer (I think I left it in class one day). I plan on recording their sounds for the world to hear tomorrow.

The Knapp Electric Questioner

Thursday, November 15th, 2007

My instrument is a 2D array controller which will be able to tell me the position of the two electrical prods. From here I plan to build an array of output frequencies which I’ll then filter through a few microchips to change their basic waveforms between square, sine, and triangle. Possibly adding a binary stage divider to multiple the octave of the signal. Still working on how these two systems will interrelate though. I’m also looking into using diodes and resistors to channel mix, one as distortion the other as modulation. Basically an early synth..

pico Farad and the Resistance

Thursday, November 8th, 2007

pF+R

the pF+R corporate logo ©

–>join.the.resist.an.ce<–

My Musical Instrument..

Thursday, November 8th, 2007

Hey all..

I have been playing weird tin cans in class and trying to generate drum kind of effect. My final product is inspired from Indian classical Instrument TABLA…

Tabla is the most used instrument in Indian classical music as well as non-classical music. It was made out of splitting an insturment which is known as MRIDANGAM…

mridang2.jpg

Mridangam was split into a bigger module named as ‘Dagga’ and smaller one named as ‘Tabla’. Dagga gives a base sound and tabla a high pitced sound. One plays tabla using both the hands. The Membrane of Tabla is made out of animal skin and has a clay head. The tabla drums are unlike other membrane drums because their playing technique is much more sophisticated and delicate than that of, say, congas or bongos, where the head it struck with the hand. The tablas require much careful practice and refinement of technique, because improper technique can easily damage the drum heads.

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The tablas consist of two separate drums, the “Bayan” (bigger for bass) and “Dayan” (small, higher pitches). The bayan is usually played with the left hand and the dayan with the right. The bayan is responsible for low booming sounds and deeper slap sounds and ‘modulation’ where the pitch is continuously varied. The dayan gives a wide range of taps, slaps, tones and other percussive effects.

bayan_.jpeg       dayan_.jpeg

There are also other instruments which were generated using Tabla like CONGA-DRUMS..

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 One more instrument which works like tabla but has both the parts (Dagga ad tabla) in one piece..this is called DHOLAK…in India

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This is a Kin of Dholak called The Arabic Dholak…

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Dholak is also simmilar to Bata which is used in different parts of the world..

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This was my research on how same kind of sound (Drumming) can be achieved by different instruments, that all the same category.

I will have already started with the initial ideas…and have bought paint containers. What I want to use instead of the animal skin membarne is either Glad plastic wrap(as suggested by Ranjit) or Aluminium foil(have already tried that in class) or just play on the lid of the container attaching micro-phone at the bottom of it.

To get the clay effect i’ll probably use an adhesive which when spread in layers gives the same feel.

I have a picture that I found simmilar to my Idea. Have a look..

new_idea.jpg

This is just an empty container with plastic wrap on top of it.

I would love to get some feed backs from anyone and everyone on the way I am moving towards building my instrument and if you think there is something else I can try please do let me know.

Posting the music that me and hisang made for our class performance. I played this on an empty can with micro-phone at the base.

girl-band1.mp3

Thanks,

Meha

Hey all……News Flash….

Thursday, November 8th, 2007

We have a new member in our group…Elie..and now we are “Awesome Trio”…..:-) We have worked on our music and it is all techanical with me consistently playing my drums:-) Elie  isworking on robotic sounds and Hisang  is playing her dual guitar…

We are having fun and hope you all will enjoy our music.

Thanks,

Meha 

Assignment for week 10, 11/9

Monday, November 5th, 2007

Post a detailed progress report about your work or plans for your final instrument.  Include photos and sound samples if possible!  I’ll ask you to post updates to this report through the rest of the semester.

assignments for week 9, 11/2

Sunday, October 28th, 2007

For 11/2: Time to get serious about building your final instrument. If you’re still unsure what you want to work on, talk to me early this week and we’ll try to get you prepared for Friday. I’m available Tuesday and Wednesday afternoons if you’d like help in the lab or want to brainstorm. (Email me for an appointment)

Jamming in class is encouraged! Just keep the door closed so we don’t make everyone else jealous.

Coming up in two weeks: for 11/9 I’d like you to write up what you’re working on and post it on the blog.

THE XING..

Friday, October 26th, 2007

Hi,

 ttap_music_151.jpg

Hsiang and I are members of THE XING..:-)

Hsiang is the lead singer and I am the drummer…we tried to fool around with a self made guitar but it didn’t work out!!

Have tried our best to be innovative…!!

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Enjoy!!

girl-band1.mp3

Meha and Hsiang.

coming up: week 8 and week 9

Friday, October 19th, 2007

For week 8 (10/26): prepare a group performance (3-5 people per group). Any instruments, any kind of music. Please post here who is in each group– or post if you are seeking a group. It doesn’t hurt to come up with a cool name for your mini-band!

If you were not able to perform in today’s class, you will do both your solo and group performances on 10/26.

We will also have lab time. Every class will have both lab time and noise time from now on.

Week 9: (11/2) You must be prepared to begin work on your final instrument! I can meet with you outside of class time if you need help deciding on a project.

assignments for week 7, 10/19 and week 8

Saturday, October 13th, 2007

It’s time for us to start thinking about performance. To get you in the mood, next week each of you will present a short performance in class. (Really short – between 1 and 3 minutes.) You can use any instrument you want, homemade or commercial, or no instrument at all. Please prepare in advance – think about what you would like to do, and practice at home. Don’t just make it up on the spot!

Later in the class you will divide up into groups (two to four people per group). On week 8 each group will present a 3 to 5 minute performance! You will be expected to get together outside of class time to invent and rehearse.

We will also have lab time for working on instruments and/or performance ideas.

assignments for week 6, 10/12

Monday, October 8th, 2007

No assignments!  Bring noisemakers to work on.

Besides lab time, I’ll be trying out some exercises from Nic Collins’ book, Handmade Electronic Music.  If you want to follow along, bring a breadboard, 9 volt battery and battery clip (you may be able to borrow some of these things from the lab) and your extra audio jack from the piezo project so you can plug into an amplifier.

The integrated circuits used in the book aren’t available at Radio Shack, but I’ll have extras to play with, if my order arrives in time!  You can get them relatively cheaply from jameco.com.  Check out the shopping list starting on page 222 of the book.

assignments for week 5, 10/5

Monday, October 1st, 2007

No homework for week 5!  But please bring your toys and tools for noisemaking lab this Friday.

Lots of thanks to Curtis for the circuit bending workshop last week!

Captured by Robots

Friday, September 28th, 2007

Captured By Robots

Captured by Robots

They say that in an attempt to create a band, JBOT (the human) created robots which revolted and made him his slave, forced to tour with them around the world for eternity.

So, the band consists of the poor enslaved human, a guitar AND bassplayer, a drummer, a horn section, and two apes. The names are brilliant: The Headless Hornsmen, The Ape which Hath No Name, The Son of the Ape which Hath No Name, and more.

I love the idea of a (rather evil) robot-band and how crudely JBOT executed it. I’m really fascinated by the technology and how smooth + rough the show is, AND at the same time I’m scared out of my pants, because these creatures look rather disgusting.

Here’s a video.

(The band website has a lot of info and pictures, but doesn’t have videos anymore…)

comments

Friday, September 28th, 2007

i loved Maywa Denky …..its was mazing and the way they presented their instruments was hillarious….thats what makes viewing their videos fun!!! I guess we all can add our personalities to the music that we create….how about that!!!