An apparatus comprising means for: providing first virtual content for presentation to a user via a user device, wherein the first virtual content is associated with a first space for user navigation at a first scale based on user position and comprises two or more virtual objects (54, 58), one of the virtual objects comprising one or more first virtual objects having respective audio signals and another of the virtual objects representing a miniature representation of a second space, wherein the second space is a virtual space, into which the user can transition within from the first space, the miniature representation of the second space having an associated second scale, smaller or larger than the first scale, for user navigation within the second space and comprising one or more second virtual objects (59, 59A, 59B, 59C) having respective audio signals audible from outside of the second space; determining based on user position whether at least part of the user is within the first space or the second space; and dependent on the determination, modifying the respective audio signal of the one or more first virtual objects audible from the second space or of the one or more second virtual objects audible from the first space such that the magnitude of the respective audio signal is either reduced or increased based on the second scale being respectively smaller or larger than that of the first scale, wherein: responsive to determining that at least part of the user is within the first space, the audio signals of the one or more second virtual objects of the second space are modified such that their magnitude is scaled down or up by a factor based at least partly on i) a distance (d) of the one or more second virtual objects to a second space reference position at the second scale plus ii) a distance between the user position and the second space reference position at the first scale, and responsive to determining that at least part of the user is within the second space, the audio signals of the one or more first virtual objects in the first space are modified such that their magnitude is reduced or increased based at least in part on i) a distance between the user position and the one or more first virtual objects in the first space at the first scale and ii) a miniature scale multiplier. providing first virtual content for presentation to a user via a user device, wherein the first virtual content is associated with a first space for user navigation at a first scale based on user position and comprises two or more virtual objects (54, 58), one of the virtual objects comprising one or more first virtual objects having respective audio signals and another of the virtual objects representing a miniature representation of a second space, wherein the second space is a virtual space, into which the user can transition within from the first space, the miniature representation of the second space having an associated second scale, smaller or larger than the first scale, for user navigation within the second space and comprising one or more second virtual objects (59, 59A, 59B, 59C) having respective audio signals audible from outside of the second space; determining based on user position whether at least part of the user is within the first space or the second space; and dependent on the determination, modifying the respective audio signal of the one or more first virtual objects audible from the second space or of the one or more second virtual objects audible from the first space such that the magnitude of the respective audio signal is either reduced or increased based on the second scale being respectively smaller or larger than that of the first scale, wherein: responsive to determining that at least part of the user is within the first space, the audio signals of the one or more second virtual objects of the second space are modified such that their magnitude is scaled down or up by a factor based at least partly on i) a distance (d) of the one or more second virtual objects to a second space reference position at the second scale plus ii) a distance between the user position and the second space reference position at the first scale, and responsive to determining that at least part of the user is within the second space, the audio signals of the one or more first virtual objects in the first space are modified such that their magnitude is reduced or increased based at least in part on i) a distance between the user position and the one or more first virtual objects in the first space at the first scale and ii) a miniature scale multiplier. responsive to determining that at least part of the user is within the first space, the audio signals of the one or more second virtual objects of the second space are modified such that their magnitude is scaled down or up by a factor based at least partly on i) a distance (d) of the one or more second virtual objects to a second space reference position at the second scale plus ii) a distance between the user position and the second space reference position at the first scale, and responsive to determining that at least part of the user is within the second space, the audio signals of the one or more first virtual objects in the first space are modified such that their magnitude is reduced or increased based at least in part on i) a distance between the user position and the one or more first virtual objects in the first space at the first scale and ii) a miniature scale multiplier.