A device for a bandwidth extension of an audio signal (100, 703), comprising: a signal spreader for generating a version of the audio signal (100, 703) as a time signal spread in time by a spread factor greater than 1 to obtain a temporally spread version of the audio signal (100, 703); a decimator for decimating the temporally spread version of the audio signal (100, 703) by a decimation factor matched to the spread factor to obtain a decimated audio signal; a filter for extracting a distorted signal from the decimated audio signal to obtain a distorted extracted signal, the distorted extracted signal containing a frequency range that is not contained in the audio signal (100, 703), or a non-distorted signal from the decimated audio signal to obtain a non-distorted extracted signal, the non-distorted extracted signal containing a frequency range that is not contained in the audio signal (100, 703), or a signal from the audio signal (100, 703) before a spreading by the signal spreader to obtain a non-spread extracted signal, wherein the non-spread extracted signal, subsequent to a processing by the signal spreader and the decimator, contains a frequency range that is not contained in the audio signal (100, 703), and a combiner for combining the distorted extracted signal and the audio signal (100, 703) to obtain an audio signal extended in its bandwidth, or a distorted signal generated from the non-distorted extracted signal or the non-spread extracted signal subsequent to the processing by the signal spreader and the decimator by means of distortion and the audio signal (100, 703) to obtain an audio signal extended in its bandwidth, or the non-distorted extracted signal and the audio signal (100, 703) to obtain a combination signal, wherein an audio signal generated by distorting the combination signal represents an audio signal extended in its bandwidth, wherein the distorted extracted signal, or the distorted signal, or the audio signal generated by distorting the combination signal is distorted such that the distorted extracted signal, or the distorted signal, or the audio signal generated by distorting the combination signal comprises a predetermined envelope. a signal spreader for generating a version of the audio signal (100, 703) as a time signal spread in time by a spread factor greater than 1 to obtain a temporally spread version of the audio signal (100, 703); a decimator for decimating the temporally spread version of the audio signal (100, 703) by a decimation factor matched to the spread factor to obtain a decimated audio signal; a filter for extracting a distorted signal from the decimated audio signal to obtain a distorted extracted signal, the distorted extracted signal containing a frequency range that is not contained in the audio signal (100, 703), or a non-distorted signal from the decimated audio signal to obtain a non-distorted extracted signal, the non-distorted extracted signal containing a frequency range that is not contained in the audio signal (100, 703), or a signal from the audio signal (100, 703) before a spreading by the signal spreader to obtain a non-spread extracted signal, wherein the non-spread extracted signal, subsequent to a processing by the signal spreader and the decimator, contains a frequency range that is not contained in the audio signal (100, 703), and a distorted signal from the decimated audio signal to obtain a distorted extracted signal, the distorted extracted signal containing a frequency range that is not contained in the audio signal (100, 703), or a non-distorted signal from the decimated audio signal to obtain a non-distorted extracted signal, the non-distorted extracted signal containing a frequency range that is not contained in the audio signal (100, 703), or a signal from the audio signal (100, 703) before a spreading by the signal spreader to obtain a non-spread extracted signal, wherein the non-spread extracted signal, subsequent to a processing by the signal spreader and the decimator, contains a frequency range that is not contained in the audio signal (100, 703), and a combiner for combining the distorted extracted signal and the audio signal (100, 703) to obtain an audio signal extended in its bandwidth, or a distorted signal generated from the non-distorted extracted signal or the non-spread extracted signal subsequent to the processing by the signal spreader and the decimator by means of distortion and the audio signal (100, 703) to obtain an audio signal extended in its bandwidth, or the non-distorted extracted signal and the audio signal (100, 703) to obtain a combination signal, wherein an audio signal generated by distorting the combination signal represents an audio signal extended in its bandwidth, the distorted extracted signal and the audio signal (100, 703) to obtain an audio signal extended in its bandwidth, or a distorted signal generated from the non-distorted extracted signal or the non-spread extracted signal subsequent to the processing by the signal spreader and the decimator by means of distortion and the audio signal (100, 703) to obtain an audio signal extended in its bandwidth, or the non-distorted extracted signal and the audio signal (100, 703) to obtain a combination signal, wherein an audio signal generated by distorting the combination signal represents an audio signal extended in its bandwidth, wherein the distorted extracted signal, or the distorted signal, or the audio signal generated by distorting the combination signal is distorted such that the distorted extracted signal, or the distorted signal, or the audio signal generated by distorting the combination signal comprises a predetermined envelope.