Finished Pieces

Barbie Karaoke

casperelectronics Barbie Karaoke

If I were to form some sort of experimental noise army, this piece would be standard issue. It’s portable, versatile, and loud.

It has four different functions.

  1. adjustable speed tape player
  2. simple, amplified mixer
  3. lo-fi echo processor
  4. odd/pulsing/morphing/bleeping sound generator

All of these functions can be used together to achieve a variety of different sounds and effects.
casperelectronics Barbie Karaoke

The echo circuit was made to only process the mic signal, but with a little re-wiring, I was able to patch the tape output into the echo also. The echo circuit itself is very simply designed and cheaply built. Changing any of its parameters causes it to go “bonkers”. The pulsing/morphing/bleeping sounds come from the echo circuit at a very low pitch setting. Lots of dense, tonal noise can be created using just this feature.

casperelectronics Barbie Karaoke Twin


The original controls and hardware are:

  • two mic. inputs
  • stereo aux. Input
  • echo on/off switch
  • mic./aux cross fader
  • right/left balance

The added controls are:

  • replaced mic. 1/8″ jacks with 1/4″ jacks
  • input 1 and input 2 volume controls
  • power switch
  • tape speed control
  • independent tape volume
  • echo pitch coarse tune and fine tune
  • echo fade momentary pushbutton and on/off switch. This effect causes the echo to become more distorted with every repetition.
  • echo hold on/off switch and setting knob
  • Three pulse/tone generating switches with adjustments. These adjustments vary the volume and speed of the pulses.


9 Responses to “Barbie Karaoke”

  • 1

    Keegan Kuvach said:
    March 1st, 2010 at 2:36pm #

    Hi pete, keegan here. how much do you charge for barbie karaokes? someone is interested in buying mine.

  • 2

    Joseph said:
    June 6th, 2010 at 9:44pm #

    Hello Casper, i’m interested by your barbie karaok√©.
    I’m a french musician.
    Can you built one for me?
    And for how much?
    Thanks by advance.
    And congratulation for all your crazy work!

  • 3

    zweitesystem said:
    September 26th, 2010 at 12:22pm #

    hello there, are these mods applicable to any tape recorder? could you provide the schematics (incl. the echo circuit). that echo circuit, is it maybe available as a kit? i may be interested to buy one if possible. thank you, Z

  • 4

    The thrift gods are smiling… « patchbaydoor said:
    July 27th, 2011 at 3:55pm #

    […] MT-240: $4.50 Barbie Karaoke Machine (similar to Pete’s at $6 Casio PT-100, Yamaha PSS-130, AND Yamaha PSS-11 together: $10 Roland HS-60 (Juno 106) Analog […]

  • 5

    becky said:
    August 2nd, 2011 at 8:57am #

    HI, I’ve been looking for a portable childrens pa system. This Barbie one looks like it would work for my children’s class. Is it for sale and do you have one that would be more gender neutral.
    Thanks, Becky

  • 6

    princess dan said:
    September 30th, 2011 at 12:18pm #

    @Becky…there is a gender neutral version labeled fisher price kid tough karaoke machine. It’s yellow, blue and red, slightly boyish if anything.
    @Pete…look for an object called the Realistic Sensor Perm. It’s a small salon appliance from maybe the mid seventies. It’s the ultimate box for rehousing barbie’s board. Freestanding, weighty, almost needing no alteration.

  • 7

    peter shoemake said:
    March 2nd, 2013 at 8:29am #

    I found a fisher price clone of the karaoke machine on ebay.

  • 8

    l'enregistreur said:
    May 6th, 2013 at 2:44pm #

    I had trouble with the speed mod as I kinda messed with the motor when pulling out the circuit.It finally works great.
    Thanks man for sharing all those tips, diagrams and pics.Not evreyone do spread their knowledge with such humility and generosity.

  • 9

    FloydSera said:
    October 24th, 2013 at 10:09am #

    would you be will to part with any of your modified toys? or make custom orders?

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