7. A system comprising: an input unit for receiving a textual query; a processing unit for retrieving a preliminary audio sample from an auxiliary audio database by matching the textual query with semantic information associated to the auxiliary audio database, and one of: retrieving a target audio sample from a target audio database by matching the preliminary audio sample with the target audio database and performing an audio-source separation technique on the retrieved target audio sample for separating the retrieved target audio sample into a plurality of audio source signals, wherein retrieving the target audio sample from the target audio database and performing the audio-source separation technique on the retrieved target audio sample are performed jointly, retrieving the target audio sample from the target audio database by the processing unit including comparing the target audio sample with a negative data set stored in a storing unit of said system; and performing an audio-source separation technique on an audio source mixture for separating a target source signal described by said textual query from said audio source mixture by matching the preliminary audio sample with the audio mixture.
7. A system comprising: an input unit for receiving a textual query; a processing unit for retrieving a preliminary audio sample from an auxiliary audio database by matching the textual query with semantic information associated to the auxiliary audio database, and one of: retrieving a target audio sample from a target audio database by matching the preliminary audio sample with the target audio database and performing an audio-source separation technique on the retrieved target audio sample for separating the retrieved target audio sample into a plurality of audio source signals, wherein retrieving the target audio sample from the target audio database and performing the audio-source separation technique on the retrieved target audio sample are performed jointly, retrieving the target audio sample from the target audio database by the processing unit including comparing the target audio sample with a negative data set stored in a storing unit of said system; and performing an audio-source separation technique on an audio source mixture for separating a target source signal described by said textual query from said audio source mixture by matching the preliminary audio sample with the audio mixture. 8. The system of claim 7 , wherein the negative data set is generated from the auxiliary audio database or a second auxiliary database.