Royalty Free Sound Effects For Music.

FM Synthesis


FM Synthesis… now that’s something you don’t hear every day in the year 2020. If you’re one of the brainiacs who knows then we probably don’t need it to explain to you!


More about this tee

If you happen to be unaware of FM Synthesis no sweat we’ll do our best to distill something that is rather complex in a few paragraphs!

FM (Frequency Modulation) Synthesis uses one signal as a modulator (for example a sine wave) to change the pitch of the carrier’s signal which results in a more complex waveform and different sound.

The particular arrangement of these signals, how many there are, and which modulators are modulating which carriers can create both harmonic and inharmonic sounds.

It’s a little complicated, especially if not put into practice to hear how these elements effect one another and the output.

Thanks to a Stanford University professor named John Chowning who developed this audio synthesis, patented and later licensed to Yamaha corporation in Japan. Their commercial use of FM Synthesis was the basis of early synthesizers including the extremely popular Yamaha DX7.

Yamaha then created a simplified version of this synthesizer by creating a chip set, which was used in video games and computer sound cards.

Our FM Synthesis shirt is call back to this musical era of arcade video games, computer games, and gaming consoles. To be more specific the time when composer Hiroshi Kawaguchi created the unforgettable 1980s soundtrack for the 16bit video game Out Run.

These were days of driving an iconic red Ferrari Testarossa Spider beachside and listening to a selectable soundtrack in 16-bit!

While the term FM Synthesis is an obscure term if you played video games or listened to popular synthesizer music from the 80s & 90s then you’ve witnessed the power of it!

This sound shirt is perfect for anyone interested in video games, arcade games, vintage computer games, sound nerds, audiophiles, to music composers.

Our tees are super comfortable with high-quality cotton and a nice cut. If you prefer a looser fit or worry about shrinking, a larger size is recommended! Please refer to the size guide for specific measurements.


– black (100% cotton)
– white (100% cotton)
– aqua (100% cotton)


       – free US & Canada shipping and just a flat $3 worldwide

       – a style that would make any audio lover envious!

       – unisex apparel for anyone to wear!

       – made of high quality 100% combed ring-spun cotton


XS, S, M, L, XL & 2XL (3XL & 4XL in certain colors are available upon request.)

T-Shirt Sizing ChartOur shirts can run a little small for some which is why suggest getting a size larger if you like a looser fit!

If you’d like a different size or color please reach out to me at [email protected] and I’d love to help you out!



Once your order is processed, you’ll receive a tracking number via e-mail.

Please keep in mind that international orders will take longer than domestic shipments within the USA. Due to customs, this could take from 5-8 business days or longer. Some countries require a duty when international packages arrive. Please refer to your local rules of non-domestic orders.


Hi there we’re Libby and Marcel! We are the to two person team behind Free To Use Sounds. As world traveling field recordists providing high-quality sound libraries, we have a real devotion to sound.

Enough so, that when we looked for cool audio related t-shirts to wear we were a little underwhelmed! So we decided to design our tees!



The name WavKind draws inspiration from the highest quality uncompressed audio format ‘Wav.’ As for ‘Kind’ it refers to the ethics of our the manufacturing process to treating others with dignity. We can all agree that the world is in need of more kindness right?

Our pieces are designed to be gifted and worn by both men and women! Drawing from pop culture, knowledge of the audio industry, and current trends, WavKind is an original shop for the “not so average wearer!”


Get 120 GB
Sounds of Iceland in
The All In One Bundle​!

For only $23 you can access over 1TB of high-quality sounds recorded around the world!

This website uses cookies to ensure you get the best experience on our website.