Controlling bandwidth in encoders and/or decoders

There are provided examples for encoding and/or decoding information signals (e.g., audio signals). In one example, there is provided an encoder apparatus comprising: a plurality of frequency domain, FD, encoder tools for encoding an information signal, the information signal presenting a plurality of frames; and an encoder bandwidth detector and controller (39) configured to select a bandwidth for at least a subgroup (33, 36) of the plurality of FD encoder tools, the subgroup (33, 36) including less FD encoder tools than the plurality of FD encoder tools, on the basis of information signal characteristics so that at least one of the FD encoder tools of the subgroup (33, 36) has a different bandwidth with respect to at least one of the FD encoder tools which are not in the subgroup (33, 36). In one example, there is provided a decoder apparatus (40, 40a) comprising a plurality of FD decoder tools (43-48a) for decoding an information signal encoded in a bitstream, wherein: the FD decoder tools are divided: - in a subgroup comprising at least one FD decoder tool (43, 45); - in remaining FD decoder tools comprising at least one FD decoder tool (44, 46, 48a); wherein the decoder apparatus (40, 40a) is configured so as to choose a bandwidth for at least one of the plurality of decoder tools of the subgroup (43, 45) on the basis of bandwidth information included in the bitstream so that the at least one of the plurality of decoder tools of the subgroup (43, 45) performs signal processing a different bandwidth with respect to at least one of the remaining FD decoder tools of the plurality of decoder tools (44, 46, 48a).