EarStudio

I've been very happy with ES100 and this app works very well. I'm using receiver in my car, and my only complaint is that when turning the car off (disconnecting the receiver) and then restarting, I have to exit the app and open it again to regain control of the ES100. Minor inconvenience overall.

I was already quite impressed with the ES100 device and had considered an app for it to be a gimmick until I saw someone mention all the stuff it could control, even while the device is being used as a USB DAC for a computer. It makes a perfect companion to my new Shure SE846 earphones, and as one of the few things I have that can drive them properly it's all the more valuable to me. ES100, especially with this app, saved me having to buy more expensive equipment. **EDIT: I do wish there was a way to add more rows of empty EQ preset slots.** **Oh and if it's possible to add a parametric EQ that would make it just about perfect**

The DAC Digital Filter settings are now inoperable. All four selections sound the same. It's probably the default Slow Roll-Off. Factory reset didn't help. Not sure whether an app update or firmware update broke it. Shame on me for not testing thoroughly. All other features OK. The equalizer Q option was a nice addition. Otherwise a fantastic device!

Marvelous. The Earstudio is an example of a Kickstarter project done right. Even though the sound is relatively similar to that of the FiiO BTR3, comparing the apps is like comparing an anthill to a mountain. The companion app for the ES100 is loaded with features to customise the sound, features that FiiO Music will probably never have. Also, to the one who said the digital filters sound the same, to the vast majority of people that will be the case. An oscilloscope shows there is a difference.

The ES100 is an impressive device, the app works quite well, I have a few suggestions: -App does not have a landscape mode (turning the phone or tab sideways) also bad scaling for odd screen aspect ratios. -For the EQ you can not hear the change as you move a frequency bar, only when you stop, which makes it a bit more difficult making changes. -For the EQ (especially on phone) I find it hard to select and move the bars because they (move points) are so small and close together. NO-ADS 👌

First of all, the device itself is awesome and the software is pretty well done. The features are great, and it's cool how everything has helpful tooltips. However, the burned in EQ really could use some work. Parametric EQ and an ability to manual enter values for each band rather than using the small sliders would be awesome!

I had trouble with the app closing as soon as it opened on s21 Android 12, but same on Android 10. If you experience the same, make sure es100 is paired first, then try opening the app with Bluetooth turned off and es100 on, the app should stay open now. Go to output in settings and change disabled to preamp or headphone amp, then turn Bluetooth on, when I did that it asked to press the power button on es100 and all was right in the world.

This is totally amazing app offers so much control over the device. First party big brands could only dream to provide such a thing. Radosne are true enthusiasts. If only i was able to turn off low battery sound... I can get up to 1 hour of use while this is blasting pings into my ears every minute. I'm getting a little fed up with this 'featue'. It's the DAC not the app, so it's still 5 stars for me.

This is a companion app for the ES100. What this app can do? 1. Configure input/output 2. Configure power settings 3. Equalizer 4. Configure DAC settings 5. Configure various volume levels and balance 6. Configure ambient mode. AND SO MUCH MORE! Im very impressed with this brand! This is a must have if you are a music enthusiast! (Hey developers, how about you add a sleep function so the device turns off after some time or after music ended. That would be nice.) Solid 5 stars app and device!

I bought your DCT Engine and Dynamic EQ last January. I was using a Samsung Galaxy Note 8 then. I switched to a Galaxy Note 9 recently and transferred the Radsone. Unfortunately, it's unusable on my new phone. It stops or crashes after more than a minute. When I restart the Radsone, the music starts from beginning and not from where it left off. I emailed your technical support. It's been one week and still no response. And I noticed the Radsone app isn't in Play Store anymore. What happened?

Unfortunately, this app no longer works. There has been no development on it for years. When you open the app, it instantly crashes. Highly unlikely that it will ever be fixed. The developers are unresponsive and it appears that the company is now defunct.

This is the controller app for Radsone ES100 USB and Bluetooth DAC. This is best $100 I paid for audio in recent past.. the clarity of the sound stage is something to experience.. moreover Radsone seems to really stand behind their product with periodic firmware upgrades adding new behavior. Totally worth it.

Great companion app with lots of ways to customize and tweak the sound being transmitted through the ES100 DAC. Lots of features have been added over time. Keep up the good work!

I've been using it for at least 3 years, I think. Very good companion to the ES-100, but I'd REALLY like the ability to save more than 4 EQ presets and edit/delete the factory saved ones.

Nice features. Now please combine the Radstone Hi-Res. Player with this, and we will have the ultimate companion for the es100. Oh, and don't forget USB OTG support, and network streaming. One more request, lol, fix not working with Chromebook. Thanks for all your hard work!

Great interface, simple yet allows for fine control over all aspects of operation. Can mix ambient sounds while playing media and other audio sources. Actively developed, keeps improving along with ES100 firmware. Incredibly versatile.

Awesome 6 star hardware + price. Formula 1 car options! BUT... no way to save settings. take my money and give me settings/profiles please! There's other quirks, but not being able to save setting... whyyyy? 😭 still very satisfied. thank to zeos review.

Is awesome mostly. Only drawback is that the volumes go up drastically by itself sometimes . just shoots up. That kills my eardrums and i have to rush to reduce it. Else all is awesome

1 BIG missing useful feature is the pop-up battery percentage whenever it's connected. Other than that it's perfect. Please add that feature.

Very impressive and informative app. I've only had the ES100 for a short while, but it's been a solid performer, and this app provides a level of control that is, frankly, bonkers.

Everything works with this app and it functions flawlessly. I really cant think of any improvements it needs, other than an integrated player.

Works great with my ES-100, easy to install. Also - this app doesn't need any permissions to sensitive information such as GPS, contacts, e.t.c. to be installed.

The App reveils a professional tuning capability on my device. Surprisingly, Sonic performance is "A" plus with BT 5.0. Connectivity with my Pixel 3XL is terrific as well as other wire-headphones.

great device and companion app, but not updated for almost two years. some minor issues here and there still unfixed.

Excellent app for an excellent Bluetooth dongle. Gives full control over codex, bit rate, volume, power and output.