Comments on: How do I synthesize speech like in old video games?

Question: How do I synthesize speech like in old video games?

fatbobsmith — Mon, 26 Dec 2005 17:47:09 -0800

Wizard shot the food! What do I need to synthesize a voice similar to that in the videogame "Gauntlet?"

I'd like to create my own voice synthesis, similar to what you might hear in the old Odyssey 2 video game system, or the arcade game Gauntlet. Is it possible to do this without actually having the physical hardware from the arcade/video game system?

How are those voices created? Are they actual recordings that are then digitally converted, or is it an artificial computer voice, similar to the text-to-speech software currently available?

Extra credit: How would one create a "Cylon" voice off Battlestar Galactica, or the "Joshua" voice from Wargames?

By: Brian James

Brian James — Mon, 26 Dec 2005 17:56:02 -0800

Green elf needs food, baaadly!

By: johngoren

johngoren — Mon, 26 Dec 2005 17:57:06 -0800

"Paperboy" employed something similar to "Gauntlet"...

By: Mr T

Mr T — Mon, 26 Dec 2005 18:01:57 -0800

The device is called a 'Vocorder' armed with that knowlege you will see them all over

By: StickyCarpet

StickyCarpet — Mon, 26 Dec 2005 18:16:35 -0800

...vocoder

By: Jairus

Jairus — Mon, 26 Dec 2005 18:25:53 -0800

Although Mr. T is technically accurate, these days vocoder mostly refers to devices that will analyse and modify existing speech, and not devices that actually produce speech without a human source.

Most speech synthesis systems are referred to as text-to-speech (TTS) systems, and there's a number of them out there.

By: Jairus

Jairus — Mon, 26 Dec 2005 18:26:55 -0800

(...to clarify, most old very old video games used TTS.)

By: herrdoktor

herrdoktor — Mon, 26 Dec 2005 18:38:35 -0800

for kicks, try the third gauntlet link here! WOO! 5 seconds and 41 seconds into the clip: Elf needs food, badly!

and Jairus is 100% correct. everything back then used TTS vs vocoding.

By: fatbobsmith

fatbobsmith — Mon, 26 Dec 2005 18:54:47 -0800

Thank you for the clarification on the terminology. I've toyed with several of the TTS programs that Jairus linked to and for the most part they seem focused on more realistic TTS synthesis. I suppose I'm looking for something that will create that "retro" sound, from the classic arcade games.

As for vocoders, all the links I've found in google so far are for hardware devices. Do software-based vocoders exist?

By: fatbobsmith

fatbobsmith — Mon, 26 Dec 2005 19:05:54 -0800

I guess I didn't search hard enough:
Cylonix - 18-channel software-based vocoder with Cylon preset

By: johngoren

johngoren — Mon, 26 Dec 2005 19:25:27 -0800

I dunno, I've heard vocoders used in Kraftwerk albums and they don't resemble Atari arcade speech synthesis...

By: jenh

jenh — Mon, 26 Dec 2005 19:30:25 -0800

According to the boyfriend, the voices in Gauntlet aren't actually synthesized, but are recorded and compressed using an algorithm called LPC (linear predictive coding). There's a special chip that does it on the Gauntlet arcade machines. You can record your own voice, then recompress it using an LPC converter like the one here.

By: filmgeek

filmgeek — Mon, 26 Dec 2005 19:48:27 -0800

What you want is a Bitcrusher.

Something to crush the samples down to around 8 bit.

Soundtrack Pro has this...and therefore, I'd assume most of the audio processing software has that too. Acid...not sure about Audacity.

By: holloway

holloway — Mon, 26 Dec 2005 19:52:51 -0800

Jenh's Boyfriend is right, they're recordings. There was an Amiga Power interview (early on, perhaps issues #3-5) with one of the creators.

By: fatbobsmith

fatbobsmith — Mon, 26 Dec 2005 19:56:14 -0800

Jenh, that's exactly what I was looking for. A little google-fu got me to this piece of software, a real-time open source LPC encoder that, with a little tweaking nails the Gauntlet voice perfectly!

By: stinkycheese

stinkycheese — Tue, 27 Dec 2005 09:52:43 -0800

Don't hurt the other players. Yet.

By: stinkycheese

stinkycheese — Tue, 27 Dec 2005 09:54:14 -0800

Er, shoot. Don't shoot the other players. Yet.

By: arto

arto — Tue, 27 Dec 2005 13:02:37 -0800

You could also grab a C64 emulator and some speech synthesis software.