# Sound question.

S

#### siliconmike

Jan 1, 1970
0
I'm looking for ICs that can output a single sound.

For example a soothing ping sound (not a single frequency beep!) on
firing up the IC.

The pitch (note / center frequency) of the sound must be variable by an
external input.

Any advise / pointers / suggestions / help / resources / hints would be

Regards,
Mike

** http://mansi.ws - the art of outsourcing **

C

#### CWatters

Jan 1, 1970
0
siliconmike said:
I'm looking for ICs that can output a single sound.

Sample your own sound into a single chip micro?

L

#### Luhan

Jan 1, 1970
0
siliconmike said:
I'm looking for ICs that can output a single sound.

For example a soothing ping sound (not a single frequency beep!) on
firing up the IC.

The pitch (note / center frequency) of the sound must be variable by an
external input.

I like sampling sounds and then putting them in a serial eeprom. A
512k unit is under $2 and can store 4 seconds at 8k/sec. The interface easily to PIC's. Luhan L #### Luhan Jan 1, 1970 0 siliconmike said: I'm looking for ICs that can output a single sound. For example a soothing ping sound (not a single frequency beep!) on firing up the IC. The pitch (note / center frequency) of the sound must be variable by an external input. 512k serial eeproms are$2.25 each from Jameco Electronics. They can
store 8 seconds at 8k/second, or 4 seconds at 16k/second. Interface to
a PIC is easy. Vary the pitch by clocking out the samples at
differenct rates.

Luhan Monat

S

#### siliconmike

Jan 1, 1970
0
Sounds easy. Only that the PCB needs to be too small, so probably a
chip with a built in D-A convertor, a negative voltage charge pump and
an audio amp would have been more suitable.

Mike

C

Jan 1, 1970
0
J

#### Jasen Betts

Jan 1, 1970
0
I'm looking for ICs that can output a single sound.

For example a soothing ping sound (not a single frequency beep!) on
firing up the IC.

an atmel AVR at90s2313 is capable of polyphonic sound through the PWM output.
that chip's obsolete. But the replacement attiny2313 should be even better
as as it can be clocked twice as fast, and has the (arithmetic) multiply
operation implemented in hardware (which would be handy for envelope shaping
etc...)

plenty of extra I/O pins if you want to signal it to make different sounds.

sample code http://geocities.com/jasen_betts/polyphonic/index.html

Bye.
Jasen

K

#### Ken Smith

Jan 1, 1970
0
I'm looking for ICs that can output a single sound.

For example a soothing ping sound (not a single frequency beep!) on
firing up the IC.

Is "firing up" applying power to?

PB
!
-------
Vin ----O O----+---!!----+---------+------
! ! !
\ ! \ ! \HC04
/ ----! O---+--! O----+---Out
\ ! ! / ! ! / !
! \ ! \ ! !
GND / GND / GND !
\ \ !
! ! !
-----------+----!!----

P

#### Paul Hovnanian P.E.

Jan 1, 1970
0
siliconmike said:
I'm looking for ICs that can output a single sound.

I can make them go "Pop" pretty reliably. ;-)

G

#### Glenn Gundlach

Jan 1, 1970
0
Paul said:
I can make them go "Pop" pretty reliably. ;-)

LOL. The trick is to 'pop' more than once and on command. Sort of like
'any landing you can walk away from is a good one. If you can use the
airplane again, it's a great one.

GG

R

#### Rich Grise

Jan 1, 1970
0
LOL. The trick is to 'pop' more than once and on command. Sort of like
'any landing you can walk away from is a good one. If you can use the
airplane again, it's a great one.

Sounds like the skydiver's comment:
Whuffo: "Whuffo you wanna go jump out of a perfectly good airplane?"
Skydiver: "When was the last time you ever heard of a "perfectly good"
airplane?"

Cheers!
Rich

J

#### Jasen Betts

Jan 1, 1970
0
Is "firing up" applying power to?

yes, I think the term dates from when steam engines were cutting edge
technology.
PB
!
-------
Vin ----O O----+---!!----+---------+------
! ! !
\ ! \ ! \HC04
/ ----! O---+--! O----+---Out
\ ! ! / ! ! / !
! \ ! \ ! !
GND / GND / GND !
\ \ !
! ! !
-----------+----!!----

neat, I did something similar with a 4047 once and it sounded quite nice too.
I wonder how a 4555 would go with a capacitor in the supply like that.

Bye.
Jasen

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