Quartz and Rochelle Salt Contact Microphones

[@--AP--]

Plot twist: the whole video was recorded on a table salt microphone attached to the mountain you're standing on.

[@retrosnips6409]

Super interesting! Thank you for going to such effort in the name of crystal transducers!

[@ThePhilStudio]

4 years ago I harvested my own Rochelle Salt using basic chimestry... seeing your video excite me because I now understand I forgot to add a 3rd pin for ground... Back to the lab!!

[@triboluminiscencia_]

Love that shirt, need more MM merch.

[@metalmarshmallowllc]

I've been thinking about it -- He everybody, upvote this comment if you want MM merch!

[@guitfidle]

If you out the pickup closer to the bridge you can get a lot bigger signal output and a more even sound. Where you have it stuck, it picks up the high E more than the rest.

[@mctavishmcardle6906]

was ready to not believe it until you tested the lucky rock. very cool!

[@metalmarshmallowllc]

Further evidence of the rock's luckiness 🧿😀

[@robertoraineriseith]

Just received mine and tested it with a Schertler Mixer against some older C-Ducer and Barcus Berry contact mics recording a wristwatch whose sound is almost imperceptible to the human ear: i'm blown away from the sensibility and audio quality of the MM Pro! Even with the gain on the Schertler and the MM Pro at max noise was almost inaudible. Great work man!

[@dornauge1995]

actually the most interesting video i saw in a while.... thank you for this :) im currently researching what crystals could actually do used in "grounding boxes" in your Hifi system ...

[@SidneyJamesXBL]

This was a really interesting video, thanks for posting it!

[@SugarClass]

Super thorough & easy to follow from test to test Great work putting all this together, man!

[@mirzahosein2261]

You are great scientist and teacher, thanks for sharing your works( i am from Iran)

[@Jononor]

Fantastic video! Excellent description of the experiments, practical solutions for connecting the crystalaro audio input and excellent quantification of the performance. I think it does sound rather good :)

[@gameyord7182]

5:21 you need to put a loose cloth over it, and you need to use a flat surface like a tray or something, i did it like that and i got at least 3 by 2/2.5cm crystals

[@kareemelabkary7611]

broo how is ur channel still small, your content is awesome! 😳 I hope ur channel gets more attention 💖

[@metalmarshmallowllc]

Aw thanks! Glad you like the videos!

[@chemicalvamp]

Sodium carbonate is sold as washing soda. Also the thickness of the quartz slice determines its frequency, thick is low, thin is higher frequency. "Crystals go to War 1943" has a really nice explanation of this.

[@jlaw8882]

Love this 🤩

[@bradyboettcher2337]

The final video sounded great! By the way, from your blogs I haven't seen any mention of open sourcing the MM DIY circuit schematics, would you consider this for makers trying to put this module in their own PCBs? I completely understand if you're keeping it proprietary though!

[@metalmarshmallowllc]

Thanks, I have thought about open sourcing it, but for now I haven't

[@kalipayne4688]

Thanks friend. I loved the explanation and the process

[@pmfalcman]

Clever. Maybe try to cut flat slice out of the rochelle salt? Along the cristal's plane. I'd try this :)

[@metalmarshmallowllc]

Its very crumbly. In one of the timelapses you can see it growing in layers; I wonder if you could control the process to grow a single layer.

[@rr-fn5bs]

i thought it sounded good at the end. id be interested in hearing it from a crystal mic placed inside inside the guitar sound hole

[@sr3d-microphones]

I thought it was a great video and enjoyed that humour, I think you're quite the genius to be honest.

[@metalmarshmallowllc]

Aw, thanks! May the light of the eternal crystal shine forever upon you

[@pierpa_76pierpaolo]

Brilliant!!! One quartz two blades and it works like a microphone. Is this idea good for surface contact mic (wood, plastic, masonry, metal, etc.)? let me know. Thank you very much.

[@metalmarshmallowllc]

I think it will work on wood, plastic, etc, but as you can hear it is not 'good', regular brass piezo discs are much better.

[@pierpa_76pierpaolo]

@@metalmarshmallowllc OK. I will try two tests. But how can I record noise in depth in a professional way?

[@metalmarshmallowllc]

@@pierpa_76pierpaolo per misurare rumore -- nel video uso software che ho scrito io, si trova qui: metalmarshmallow.com/widget.php?w=Advanced_Diagnostics ho anche visto altri usasndo software chiamato 'REW', lo si trova qui: www.roomeqwizard.com Mi dispace perche non parlo l'italiano bene!

[@pierpa_76pierpaolo]

@@metalmarshmallowllc Perfetto. Interessante. Intanto ho scaricato il software e poi domani lo provo (Perfect. Interesting. In the meantime, I downloaded the software and then I will try it tomorrow ). 👍

[@SianaGearz]

Steve Mould science feud, let's go!

[@diegoftorrent]

Hahaha! Very nice video Bro!!!! Congratz

[@guitfidle]

Have you tried slicing the rochelle salt crystals?

[@metalmarshmallowllc]

@SteveMould was wrong! Wrong wrong wrong wrong!!

[@markg1051]

Feeling better now that you got that out of you, hmmm?😃

[@douwejan]

Would the noise be less and the sensitivity higher if you grow a thinner crystal?

[@pierpa_76pierpaolo]

Is it quartz or Rochelle salt ? Or did you get a "crystal" of Rochelle salt (but it has the same yield as quartz) ? I need to understand since I don't speak English. 🤬

[@metalmarshmallowllc]

I just added 'chapters' to the video. The first three and a half minutes show quartz only. The next four and a half minutes show rochelle salt only. The remainder of the video compares both, and the final guitar recording uses rochelle salt. I hope that helps. What is your language?

[@pierpa_76pierpaolo]

@@metalmarshmallowllc Okay. Thank you. I'm Italian.

[@pomontty]

amo tus videos

[@diegoftorrent]

Bro, you just need to try add a membrane, like a plastic or balloon.

[@PhantomPvPz]

This guy is so cool

[@PhantomPvPz]

Guitar at the end was fire

[@Crookedcross322]

Figure out how to make d 104 silver eagle mic elements, you'll be rich

[@Levibetz]

Now if only you could grow these crystals on something like a brass disk hummm haha

[@metalmarshmallowllc]

haha, doh! 🤦‍♂

[@Levibetz]

@@metalmarshmallowllc Now that being said, imagine if you used that capability to integrate the crystal into an instrument. Like a guitar with conductive paint (or epoxy), crystals grown right on top, and then wired. You could maybe cover much more surface area than a piezo typically could.

[@cookiescandies7937]

Way too empiric for my taste.