Rompler is a nickname for an electronic musical instrument that playbacks samples stored in ROM chips to generate sound. ...
http://en.wikipedia.org/wiki/Rompler-.-
by Harry Lythall - SM0VPO
It is funny that many of my ideas come to me whilst I am on the toilet. This one is no exception. In this project I will show you how to compose WAV audio files on your computer, then blow them to an EPROM that can be read using a simple pocket-sized CMOS reader. Unfortunately this project means that I need to explain loads of data about Micro$oft .BIN and .WAV files.
The electronics is ridiculously simple and the speech quality from this project is surprisingly clear, far better than the proverbial "BBC Quality" (I listen to the BBC World Service daily and I think that "BBC quality" on HF is crap!!). The unit I will describe is far in advance of those little "fart machines" or "laughing boxes" that seem to be quite popular as presents this Christmas. You will be able to record two seconds of decent quality AF on a 2764 EPROM, with a 4KHz sample rate. You can double this to four seconds if you drop the sample rate to 2KHz, which is the point at which noticeable distortion begins to appear. A 27256 will give you eight seconds at 4KHz sample rate and 16 seconds at half-rate. I only need 2 seconds to say "ESS EMM ZERO VEE PEE OH". If you want to recite 'War & Peace' then you will need a few hard disks. I am presently looking into a bit of logic that can read data from those old obsolete 40M/byte and 120M/byte hard disks that you have probably got lying around. Software Needed ...
http://h9n1fls307o1036.telia.com/eprom/wave_00.htm-.-
Thursday, November 13, 2008
A True Rompler (1): Raw Digital Audio
Introduction
I wanted to make a device that plays back digital audio, without the use of any programming or a microcontroller or a computer. In other words, the most basic rompler, as a hardware-only device.
Overview
A 32KB EPROM is used to store some digital audio. A counting circuit is used to sequentially (or otherwise) recall the samples from the memory byte-by-byte. These bytes are then converted to an analog waveform, ready for amplification and listening.
Preparing and Transferring the Audio
I sequenced a two bar loop at 240 bpm. This equals 2 seconds of audio. This was then converted to a sample quality of 8 bit / 16,384 Hz, so that two seconds' worth fits into the 32KB memory space exactly. ... (Sebastian Tomczak)
http://little-scale.blogspot.com/2008/11/true-rompler-1-raw-digital-audio.htmlhttp://little-scale.blogspot.com/2008/11/true-rompler-2-drum-machine.html