SDRplay Releases SDRuno: Free SDR Software for the RSP

The SDRplay is a $149 USD RX only software defined radio with a 12-bit ADC and up to 8 MHz of bandwidth that can tune from 10 kHz – 2 GHz. We consider it and it’s competitors the Airspy R2/Mini to be the best next step up from an RTL-SDR. See our previous post for a review comparing the Airspy and RSP.

One of the main drawbacks of the RSP has been that it does not have any official software associated with it. The closest competitor, the Airspy has the free official SDR# software, but the RSP relied only on third party programs like HDSDR and SDR-Console.

That is set to change today as SDRplay have announced the release of their SDRuno software, a free general purpose software defined radio program for the RSP. SDRuno is a customized version of the Studio1 software which SDRplay acquired the rights to last April. The full press release is quoted below:

SDRplay is pleased to announce the official release of SDRuno for the RSP. SDRuno is the new name for the RSP compatible version of Studio1, the rights to which we obtained and announced on 28th April. SDRuno contains native support for the SDRplay RSP and no extra plugins are required. Third party hardware can also be supported via the ExtIO interface, but with reduced functionality.

SDRuno provides a rugged and flexible, high performance SDR receiver capability and boasts some excellent features:

  • Multiple ‘Virtual Receivers’ which allow for simultaneous reception and demodulation of different types of signals within the same receiver bandwidth.
  • A selectivity filter with an ultimate rejection greater than 140 dB.
  • A unique distortion-free double stage AGC with fully adjustable parameters.
  • Multiple notch filters with BW adjustable down to 1 Hz, Notch Lock feature.
  • A unique synchronous AM mode with selectable/adjustable sidebands, dedicated PLL input filter, and selectable PLL time constants.
  • SNR (stereo noise reduction), featuring a proprietary noise reduction algorithm for stereo broadcast.
  • AFC for FM signals.
  • Calibration for receiver frequency errors.

Over time, we plan to add many more features to SDRuno to enhance the user’s experience of this very powerful piece of software. This software runs on Windows and we don’t yet know how easy it will be to migrate it to other platforms but this is something we will be investigating.

SDRuno will be made freely available to all current and future users of the RSP – to download a copy – simply go to

Our support for SDRuno in no way lessens our commitment to support HDSDR, SDR Console, Cubic SDR or ANY other software solution where the authors are willing to work with us. We fully recognise that many people have strong preferences for particular pieces of software and we do not want to do anything to undermine the options that people have to use their favoured software packages. Indeed, our view is quite the opposite. Our objective remains aim to have our hardware platforms support any and every SDR package out there. This of course may not be possible, but it is our philosophy and part of the ethos of our company.

About Studio 1:

Studio1 was developed in Italy by SDR Applications S.a.s. and has hundreds of happy customers around the world.

Studio 1 is known for its user friendly stylish GUI, CPU efficiency and advanced DSP capabilities, including features not available on other SDR software packages.

About SDRplay:

SDRplay limited is a UK company and consists of a small group of engineers with strong connections to the UK Wireless semiconductor industry. SDRplay announced its first product, the RSP1 in August 2014

Email: [email protected]

The software can be downloaded at SDRuno comes with a full manual (pdf) and SDRplay fans and beta testers of SDRuno have also released a free SDRuno cookbook guide (pdf). From the cookbook it appears that SDRuno is also compatible with any SDR that supports ExtIO modules, like the RTL-SDR, although as noted in the press release functionality for other radios may be reduced. We look forward to being able to test the software out, and post a review within the next few days.


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i have a brand new out of the box kamrui mini pc. running a rtl-sdr sdrsharp.dongle
can i run sdruno


I put ExtIO_RTL2832.dll in every directory I could think of, and still SDRuno reports “No ExtIO.dll found” and obviously, it won’t let me select it. Renamed it to ExtIO.dll… same thing. Anyone have a clue how to fix this?
Running WinXP, SDRuno 1.06 (SDRuno.ExtIO.exe)
Thanks ia.


please do not use XP
it is a virus magnet and is now dead for 4+ years at Microsoft.
try a PC made in the last 10 year, not 18 years old,
windows 7 up., is a wise choice.
used PC are cheap here. (USA)


I feel very upset, you advertise this product as working on Linux It dos not.
Win 7 NO unless the resolution is very high.
Why do you not publish minimum requirements.
Why do you not answer your followups when the system will not work.
So far many hours of work and over 120 quid wasted.
All my other SDR dongles work on Linux and Windows. your software is not up to the Job.
Please explain.


So sorry, thank you.


Please know that there are 100s if not 1000s of Linux distributions.
have you tried Ubuntu v16+?
or windows 7/8/10? yet.
there is no way to publish minimum requirements with PC made from 1981 to now.
and 1000s of OS, made.
ok any PC made new or newer, 10 years ago
with w7 and newer OS from Microsoft.
if running Linux 1000s of distributions,? for 20 + years? ask the maker to name one that works?
or join their forum and ask other members what works, ?
good luck.
why not buy a used HDD and load w7 on it.
that be a wise start, then play with Linux next, try Ubuntu v16+ first.


However EVERY software manufacture be it productivity or game software HAS ALWAYS given a minimum system requirement. Not that hard to do. I’m a little put off with this guessing game of will it or won’t it work.


Modulated or modulation what a rubbish question.
Just waisted 1/2 with comments to find this deletes all my work.


the owner does not want to pay royalties to Capcha services. why would anyone? not making big money?
on my web site, (sold)
it asks text questions,
like what is 2+5 =?
or what is Batmans cap color, wow some don’t even know this. black
or the color if good living grass, green
try using wiki, what is FM radio mean.
to post a long post try PC notepad, then paste it, on click paste is this hard?
in Linux us Nano.


Windows 10 — install hangs installing driver
Is windows 10 supported ??



yes, but did you read the page on installs.
it says, shut down AV, defender is one, AV, and shuts down easy, ask how at
hint click defender in the task bar,right clicked
then pick left icon
then virus and threat protections
then disable real time protections
now install.
there are other more complex ways, sure, firewall settings and AV exceptions… endless. and hard.

Robert Long

Yeah… until it comes out for MAC… sorry, I cannot buy. And unfortunatly, I will not run a virtual.. (I like to multi task with other mac windows open…virtual will not allow this)
I’ll keep checking back (as will MANY others to buy when a MAC version comes out)

Hopefully, soon!


Yeah I want a MAC version too, Linux and Mac users always suffer.

An easy install for Ubuntu and Arm7 devices would be nice too.


Yes indeed. A Macintosh version please, and one that radio geeks as opposed to computer geeks can understand how to install. Please. Pretty Please? 🙂

Robert Dale

Strange, I run a VM on my iMac which runs HRD 5.0 and either PowerSDR or Nap3 beside all my Mac programs, no problem at all. No glitches, latency issues or sound problems. That said, a native OS-X version would be nice.


Is a TV demodulation in SDRUno, to be used with SDRplay planned in future?


Where’s my Windows Mobile 10 port?!



Will SDRUno support MSPS higher than 0.96 so third party hardware other than RTL-SDRs can be used with SDRUno? Airspy R2’s lowest is 2.5 MSPS and Airspy Mini’s lowest is 3.0 MSPS.

Jon Hudson

Latest news from SDRplay re updates for SDRuno: We are aware of a number of issues, bugs and feature requests. We will be addressing these in a series of updates. Some of the feature requests will take some time as we are determined to implement them correctly and make them intuitive. With that in mind, SDRuno version 1.1 will be released around the end of August and will consist largely of bug fixes. We expect to make further regular updates after that to address some of the other issues and features we’ve all seen and been thought about. We are also going to be producing some webinars with the aim of not only getting people familiar with SDRuno, but to help people achieve specific tasks. We will be providing more details about these in the next couple of days.

Other software updates: Our immediate priority is to release the new API and EXTIO so that we can deliver the recent enhancements (VLF coverage, performance improvements, higher sample rate and improvements for developers, etc.) to users of the other popular software: SDR Console (working with Simon Brown) and HDSDR (via our updated EXTIO interface) We aim to have the release of both of these during the first week of July. We will then produce an update to the SoapySDRPlay library to support CubicSDR (Charles Cliffe).

Meanwhile Paul and Mike have made a major update to the SDRuno Cookbook, which now includes setup for CSVUserlistbrowser, a great database setup that allows for rudimentary scanning… V1.003 now runs to 28 pages


“pis off”? thats foul language! 🙁
And why do you want to run a desktop application on IOS?
And why so anally annihilated? You said you got a windows pc/partition, so why do you want it on OS X? (i guess thats what you’ve meant)
Why return it? you know, you can also use it with other software packages, just saying.
Also, they said they might port it;
ever heard of virtual machines or WINE?


I think your sarcasm detector has malfunctioned. 🙂


dELET thIs


I’m very upset that there is no IOS version of SDRuno! Therefore I am returning the SDRPlay to HRO, deleting SDRuno from my Windows systems and boycotting SDRplay. They will learn not to pis me off


Goodbye crapple fanboi


Competition is a very good thing. By providing their own software to interface with the RSP, they are no longer at the mercy of a third party to provide support for the RSP. This is great news! Personally, I would have been willing to part with cash for SDRuno.

SDRuno works great with my RSP. It can be complicated to correctly setup, operate, and get used to – just like the other SDR packages already out there. It’s akin to the differences between operating Agilent and Tektronix spectrum analyzers. You can perform the same functions with both … how you go about it differs.

Personally, I’m not worried about who is catching up to who. The RTL-SDR provides a solid and extremely affordable product. It has single-highhandedly gotten me excited about radio again. The SDRplay RSP and Airspy products provide improved dynamic range, frequency coverage, and instantaneous bandwidth. Pick anyone or all of them. Just enjoy what has been made available and explore.



Seems to work pretty well with the RTLSDR. Looks like you’re limited to a .25Msps rate though, unless I’m missing a setting somewhere. A bit of a learning curve to the whole thing but overall I like it.


Everyones butthurt because they wont get a piece of software ported to their OS.
that’s why you have a VM.

stop crying.


AWOOO~ Well said.


I get it……..that’s where the money is.

The market share for Windows, for operating systems used on desktops, is greater than 90%.


Trying to play catch up with airspy and still behind.


Airspy doesn’t even cover HF, you noodle.


I’m trying to understand the logic in your post. Can you give me some type of example as to what the other company or companies might be?

I guess if SDRPlay does port to Linux and they don’t port to OS X with SDRuno they will all be doomed to the pits of SDR hell.



Oh no! Not the same mistake like other companies. Do not produce Windows only SDR software!!!


The funny thing is if you provided a version of software for Windows, OSX and Linux then someone would be complaining about no ARM support and if you had ARM support then someone else would complain about no *BSD support on Sparc architecture.

The moral is that no one can ever please everyone, it is best to chase after the largest market segment and work your way down to the fringe and always set a cut-off point less than X percent of total users you wanted to be on your own, so you are on your own.


Nonsence. Aiming at the majority in the first instance, if far from a mistake – it’s smart business. And as your’ve not noticed, Android is also supported, you noodle.