openinverter forum

Posted: **Sun Jan 26, 2025 10:54 pm**

Has anyone ever thought about a sound generator ?

Posted: **Sun Jan 26, 2025 11:53 pm**

Like we would add a 12cylinder Merlin engine sound to ev?
Never

!

Posted: **Sun Jan 26, 2025 11:59 pm**

The thought actually crossed my mind. Using marine speakers with model aircraft sound modules. I seen a circuit somewhere that immitates 8cylinder engine.

Or someone could add inefficiency to zombie code below 30km/s and produce a kind of jedi sword sound...

I noticed ACIM motors produce a squeaky sound when starting since amplitude is higher than optimal

Posted: **Mon Jan 27, 2025 12:04 am**

arber333 wrote: ↑Sun Jan 26, 2025 11:53 pm Like we would add a 12cylinder Merlin engine sound to ev?

why not

no, seriously, I have had pedestrians cross the street several times because you can't hear anything at low speed, it's for safety and of course it's not meant to be a game changer, maybe the Porsche Taycan module, but I think it runs on flexray, not easy

Posted: **Mon Jan 27, 2025 12:55 am**

I made some progress with a teensy and a WAV shield. Used a cheap mono amplifier and a 40mm speaker from an old set of computer speakers. The plan was to write a code that would play the sound when direction mode was F or R and speed under 30kph. Haven't bothered to finish the project though since it's not a legal requirement for me.

If you want to change the pitch with speed it gets more complex. I also had to take care to generate my wav file so it could loop smoothly. Can share it later if anyone cares. Created it myself from scratch in a sound editing program. Sounds a bit like an electronic 'wub wub wub' without being too much like the jetsons or anything cartoonish

Posted: **Mon Jan 27, 2025 10:17 am**

I have integrated audi exhaust loudspeakers. There it is called “active silence”. As my car is old (1950) and I want to preserve the character of the car, I simulate the sound of the combustion engine including the automatic gearbox. This is not a legal problem as long as it is not louder than the original car. If I want, I can also switch it off or only activate it at slow speeds.

Posted: **Mon Jan 27, 2025 10:25 am**

Do you just replay fix rpm sound or does it change depending on speed?

If somebody likes Hyundai sound, the modules seem to be easy to control, and sometimes cheap. Found one of the ioniq for 30Euro on the bay, will have a look inside.
viewtopic.php?p=79096#p79096

Posted: **Mon Jan 27, 2025 11:11 am**

If someone could hack the sound module of the Porsche Taycan, that would be my favorite

https://www.youtube.com/watch?v=fxSBMTwE858

59D - Motorsound.pdf: (74.38 KiB) Downloaded 486 times

Posted: **Mon Jan 27, 2025 11:30 am**

medo wrote: ↑Mon Jan 27, 2025 12:04 am why not
no, seriously, I have had pedestrians cross the street several times because you can't hear anything at low speed, it's for safety and of course it's not meant to be a game changer, maybe the Porsche Taycan module, but I think it runs on flexray, not easy

See here off the shelf...
https://www.conrad.com/en/p/reely-v8-so ... OHb1stRxeY

https://www.mtroniks.net/prod/Sound-Sys ... ndv8bb.htm

https://www.mtroniks.net/prod/Sound-Sys ... undv12.htm

https://www.aliexpress.com/item/1005007 ... ry_from%3A

https://www.aliexpress.com/item/1005005 ... ry_from%3A

Posted: **Mon Jan 27, 2025 4:04 pm**

uhi22 wrote: ↑Mon Jan 27, 2025 10:25 am Do you just replay fix rpm sound or does it change depending on speed?
[/quote

If the question is addressed to me. The frequency changes with the calculated speed, the sound is load-dependent (accelerator pedal position) It shifts 4 gears, the shift points vary with the accelerator pedal position. When accelerating hard, it shifts down a gear. The slippage of the torque converter is also simulated. The calculated engine speed is also displayed on the instruments.
]

Posted: **Mon Jan 27, 2025 4:48 pm**

Wow, great. Is this the OEM sound machine or something selfmade?

Posted: **Mon Jan 27, 2025 6:01 pm**

I have installed this system. The engine sound is generated by the Audi control unit (black box), which also contains the amplifier. The blue Kufatec box controls the Audi box and needs two CAN bus signals, one for engine speed, one for load. I have programmed the gearbox simulation on an AVR AT90CAN128, which calculates and generates the necessary CAN signals and controls the rev counter and all other displays. There are 2 speakers mounted in the rear of the chassis which end like exhaust pipes below the bumper.

Posted: **Mon Jan 27, 2025 8:15 pm**

I want to use the VW Soundmodule 1EA035335
This is the same one as in the Audi E-Tron GT and maybe the Porsche. It will take some time till I get to this point in my project, but when I get this to work I will post a Tutorial on here. Ill keep you guys updated

Posted: **Mon Jan 27, 2025 8:21 pm**

I also ordered one from the USA, these things are very expensive here, do you have a circuit diagram or the pinout for it?

i thing is the same

Posted: **Mon Jan 27, 2025 8:31 pm**

Different Part numbers. 1EA...... is MEB (the current VW platform), the 9J1...... looks like a Porsche part number, the "MLB EVO" is the old Audi line. Not sure how similar they are on the engine CAN.

Posted: **Mon Jan 27, 2025 10:18 pm**

Jeep wrangler in Canada with GS450H and Thor sound generator

Posted: **Mon Jan 27, 2025 10:44 pm**

Cool,
Due to legal requirements, all newly registered electric cars have to produce artificial noises since July 2021 so that pedestrians and cyclists are better protected, so this should also be tackled

Posted: **Wed Jan 29, 2025 11:10 pm**

This was discussed quite a few years ago and I looked into it for a little while but nothing really came of it.

viewtopic.php?p=29585&hilit=vess#p29585

The Hyundai Kona VESS unit looked relatively simple to hack. I never got back to my Ioniq unit since other things have taken priority.

Posted: **Thu Jan 30, 2025 9:06 am**

Surely a zafira pump fills the requirement?

Posted: **Thu Jan 30, 2025 9:29 am**

I saw a go with an empty jug and a small electric motor with rope attached that smacked the jug to make V8 sound...

Posted: **Thu Jan 30, 2025 10:19 am**

The legal aspects for Europe can be found in the Regulation (EU) No 540/2014

Posted: **Thu Jan 30, 2025 8:27 pm**

Definitely more fun to build something yourself.

But, if cost is no object, BORLA already makes a system. I don't know if its worth USD$1600 though!!! The below link has a good video:

https://www.borla.com/products/ford-mus ... tem-253100

Posted: **Sat Feb 01, 2025 10:05 pm**

Er...i didnt know motor can produce music... check this thread

https://endless-sphere.com/sphere/threa ... st-1813540

Posted: **Sun Feb 02, 2025 11:56 am**

Had a closer look to the Hyundai Ioniq VESS, which may be uses the same concept as the Kona. Looks like these offer good opportunities to add an own sound. The sound samples (for driving, reverse bing and annoying beeeep) are stored in a SPI flash, and played by the Yamaha sound chip in different speeds depending on the vehicle speed. Was able to read the flash and listen to it on the PC with Audacity

Did not yet patch the original unit, not sure whether I go this risk before the TÜV date ;-/
Unfortunately there are different software versions flying around, and the VESS which I ordered cheap, with version 1.00, does not play in my car at all.
Results here: https://github.com/uhi22/Ioniq28Investi ... oundSystem

Posted: **Mon Feb 03, 2025 12:43 am**

uhi22 wrote: ↑Sun Feb 02, 2025 11:56 am Had a closer look to the Hyundai Ioniq VESS, which may be uses the same concept as the Kona. Looks like these offer good opportunities to add an own sound.

Ok that would be awesome.

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Sound generator possibilities of implementation

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