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JAYS Curves


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JAYS Curves is not only an easy-to-use music player, it also provides optimized sound quality through the use of Dirac HD Sound® technology. This patented DSP (Digital Sound Processing) technology by Dirac is the most advanced available today.

The t-JAYS Four earphones have been acoustically analyzed with high-resolution measurement equipment, which has allowed the scientists and sound engineers at Dirac and Jays to create a tailored software sound processor for unbeatable sound. This app makes your iPhone and t-JAYS Four perfectly calibrated for the purest possible sound reproduction.

Compared to the original sound of the t-JAYS Four, Curves give you more of a "high-end" sound with a neutral, transparent and balanced bass and also a lot more details in the midrange and treble. JAYS award winning 250 USD q-JAYS balanced armature earphones was the benchmark when tuning the acoustics.

By using quality hardware components in conjunction with software optimization, the limit of what was earlier possible in terms of sound quality has been surpassed, effectively allowing the hardware to reach its full potential.

Dirac HD Sound is far from a generic sound effect or EQ used by many others, it is based on years of cutting edge research from Swedish audio research firm Dirac Research, and is also used in professional cinemas, music studios, and by companies such as NAIM Audio, Theta Digital, BMW, Bentley and Rolls Royce.


-Dirac HD Sound® DSP filter, tailored for t-JAYS Four earphones providing a new music experience.

-A simple and easy-to-use music player (Works with all earphones. Uses iTunes music library).

-All the functions you’re used to, but re-designed easier to reach.

-Cross Channel (L-R) mode to switch on when wearing your earphones reversed with cable behind your ear.


This app with the DSP sound filter activated is tailor made for use with t-JAYS Four earphones by JAYS and is therefore not recommended to be used with any other earphones as the filter most likely will not benefit other earphones’ sound signatures.

With DSP filter switched off, the Curves player works great with all earphones and you can still enjoy the use of the simple interface with easy-to-reach multi-feature buttons and all the other functionalities such as cross channel and much more.

JAYS Curves is optimized for iPhone 4, iPhone 4S, iPhone 5 and iPod touch.

Not compatible with iCloud music nor iTunes Match.


Our mission started out in Sweden in a small scale with a global scope of not letting go when it comes to stronger musical experiences in the canvas of all people’s everyday life. People are pretty much the same over the world and we all strive towards better in all things that we do and that we are. Our way of making better is to do exactly what we do, greatly enhancing the experience of mobile music.

We know that our fans and users makes a JAYS Generation, that always looks for better and expect us to provide it. Simply because we can, we keep it simple and develop advanced hi-tech in black and white at affordable prices in innovative award-winning products. We believe that the color should be deep in the music and not in the surface. Since we develop our own designs, we don´t have to hide them. Simplicity and quality is always in fashion and we have a great love for music, art and innovation. Technology is just our means for making it human.

This is our way of passing on our vision to our respected users, setting a new standard on what to expect when expecting better. As all good things, we are a work in progress, but we have come a long way in a few years. We would love it if you would like to join us, proving that we are doing it right. Since without you, this would be nothing.

What's New in Version 1.1

-Minor bug fixes

iPhone Screenshots

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Customer Reviews

Great App, but a few bugs here and there

This is an amazing app. My T-Jay Fours sound great with the Dirac EQ pumping through them. Everything is perfect with audio quality. My issues are the bugs that come along with it. For example, if I select a song then immediately press the lock button, the song about 70% of the time just won't play and will be frozen at 0:00. The other bug is one I find more frustrating, sometimes once a song starts it will get about 10 seconds in and the audio will stop but the song continues to keep playing with, again, NO AUDIO, forcing you to choose a new song then go back to the original song hoping it won't freeze again. Overall great app, 4 stars just because of the bugs, and they're important bugs to get sorted out.

the best, most elegant music player

What a surprise! An app/music player that sounds great, looks great, and informative without useless junk. Cover art looks much better too. Way more organized than Apple's music player. Again, nice surprise! Fab job-:)

Excelent music player

Is a incredible music player, excellent quality in DSP and equalizer, my songs sounds more clean and the bass is awesome, definitively this app gain their space in my iPhone's dock

JAYS Curves
View in iTunes
  • Free
  • Category: Music
  • Updated:
  • Version: 1.1
  • Size: 5.4 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 5.1 or later. Compatible with iPhone 4, iPhone 4s, iPhone 5, iPhone 5c, iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPad 2 Wi-Fi, iPad 2 Wi-Fi + 3G, iPad Wi-Fi (3rd generation), iPad Wi-Fi + Cellular (3rd generation), iPad Wi-Fi (4th generation), iPad Wi-Fi + Cellular (4th generation), iPad mini Wi-Fi, iPad mini Wi-Fi + Cellular, iPad Air, iPad Air Wi-Fi + Cellular, iPad mini 2, iPad mini 2 Wi-Fi + Cellular, iPad Air 2, iPad Air 2 Wi-Fi + Cellular, iPad mini 3, iPad mini 3 Wi-Fi + Cellular, iPad mini 4, iPad mini 4 Wi-Fi + Cellular, 12.9-inch iPad Pro, 12.9-inch iPad Pro Wi-Fi + Cellular, 9.7-inch iPad Pro, 9.7-inch iPad Pro Wi-Fi + Cellular, iPod touch (4th generation), iPod touch (5th generation), and iPod touch (6th generation).

Customer Ratings

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