SoliCall is designed to improve audio quality in any type of voice call. We offer robust noise reduction algorithms that are capable of attenuating any unwanted sound or voice from phone calls. In addition for cancelling non-human sounds, we can cancel voices of people that are talking nearby. In addition to noise reduction our technology also includes a robust echo cancellation that is used both in the client side and in the network side. Some of our customers embed our technology in their software/devices while others install our plug-and-play products in their network.
Yes. SoliCall offers several plug-and-play products that can be seamlessly installed in most communication environments. For more information visit our
There are two type of noise reduction filters. PNR that uses human acoustic profile to attenuate non-human sounds. RNR that uses a reference to cancel voices of people that are talking around you. For more details, the following post elaborates on the different types of noise.
Yes. Using SoliCall's unique server side/network AEC, you can cancel echo in your network. SoliCall's unique echo cancellation removes echo even with a very long delay. You can use SoliCall to remove echo generated on mobile devices with low-end CPU, echo generated on intercoms, echo coming from any remote network etc.
The selection is not always a clear cut and sometimes more than one product is suitable. For more details and guidelines, start
Usually this means that you are using an old version that is no longer supported. Please download and install the latest version of SoliCall Pro
During installation, SoliCall Pro is installing a virtual audio device. On some rare scenarios this operation will trigger an error message from Windows saying something like "a digitally signed driver is required". This message means that your windows version is unable to read/identify our digitally signed driver certificate. Go to windows update and make sure the latest security updates are installed on your computer.
This can happen due to automatic gain control of Windows. Please open the "sound" menu of Windows and navigate to the "communication" tab. In this tab, select the "Do nothing" option.
If you see your microphone in *** ON *** state (i.e. open) even when not during a call, then most probably it is constantly open by "Host Process for Windows Services". To resolve this, left-click the microphone icon in the system tray and select sound settings. In the sound setting window turn off the main switch under "Allow apps to access your microphone", and then turn it back on again.
Please open your microphone properties and make sure your microphone is not muted.
Go the search windows and type "control panel". Inside the control panel select "sound". Right click on the Speaker you want to use and "Set as Default Device" Right click again on the desired Speaker and "Set as Default Communication Device" Once done, there will be no green icon next to SoliCall's Speakers. Repeat the last two steps also for the microphone, in the "Recording" tab:
Make sure the option of "Echo Cancellation" is enabled. You can increase the aggressiveness of echo cancellation. In addition, try to turn the volume of your microphone down (by using windows control panel ). Also, make sure that the speaker volume is set to allow you to hear the other person conveniently (not too low, but not too high either).
When you hear echo, the problem usually originates at the far end. We recommend that you ask the other party to: (1) Set his/her speakers’ volume to a comfortable level (not too high). Also, they should try to keep their speakers away from the microphone. (2) The other party should either install SoliCall as well (since SoliCall has built-in algorithms that reduce echo) or use headsets. (3) Activate the option of "Incoming Echo Cancellation" in SoliCall Pro.
Make sure that SoliCall Pro is running. An easy way to tell is if the icon appears on your task bar.
During the call, SoliCall Pro creates two files, one with a speaker extension (*.spk) and the other with a microphone extension (*.mic). When the call ends, SoliCall merges them into a single wave file. This operation may take a few minutes, depending on the length of the call.
That's because you listen to it in mono. Make sure you have two speakers plugged-in and turned-on, and that your settings allow you to hear audio in stereo. Another option is to change the Recording Format to Mono.
Because of software patents we cannot distribute an MP3 encoding software.
When this warning message appears it mean that SoliCall cannot perform echo cancellation because different formats are used for the microphone and speakers. Usually this is caused by different applications that simultaneously use the audio device. If you encounter this problem, please close all other applications that might use the audio device for playback and/or recording and make sure only your VoIP application is running.
This message appears when multiple users are logged-in together on the same PC. This can happen when the Windows "Switch user" operation was used and it kept both the old user and new user logged-in. This behavior is due to the fact that SoliCall Pro is a special application that is connected to the virtual audio device driver. Therefore only one instance of SoliCall pro can be simultaneously executed on a single computer. To avoid this message simply use the Windows operation "Log Off" before a new user log in.
There could be few reasons causing this error message. It can be that the license file you provided does not exists or can not be read. Alternatively the license file you are using is not valid for the version of SoliCall Pro you are using or it had expired. For more information, check the log file C:\Program Files (x86)\SoliCall\log\errLog.