Hi, Financial investment is always an "objection".
Professional recordists have to make a choice of what might make them an income, and what won't. Many high quality more standard mics cost as much as a Rode NTF, an Ambeo, or a Soundfield, and they may need many of the former and radio mics for their earning work. And then there are the top quality recorders and mixers, trolleys, cabling, road cases and transport, timecode links, and an assistant or two. The biggest budgets for location sound recording are in film. Many of those sets are so noisy that immersive sound recording is rarely usable. Those working at the top end are certainly earning enough to afford more unusual equipment. The rest of us have to be very careful. It is easy to spend money but some things don't even pay for themselves, let alone increase one's income. Some technologies move very fast, so we have to beware of obsolescence. There are indications that the VR expansion, which is probably driving the market interest in ambisonic microphones, may be stalling. The desire for "immersive" audio is certainly growing, and ambisonics is immensely useful, but it is not really right for large scale events where things like d&b's Soundscape, L'Acoustics LISA, Timax, and Astro Spatial Audio seem to be the main competitors. These are all based on Delta Stereophony, which can be regarded as a cut down form of Wavefield Synthesis. Ciao, Dave Hunt On 24 Feb 2019, at 17:00, sursound-requ...@music.vt.edu wrote: > From: Stefan Schreiber <st...@mail.telepac.pt> > Subject: Re: [Sursound] Enquiry on upmixing from 1st order ambisonics to 3rd > order ambisonics. > Date: 24 February 2019 13:58:25 GMT > To: Surround Sound discussion group <sursound@music.vt.edu> > > Citando Dave Hunt <davehuntau...@btinternet.com>: > >>> From: Politis Archontis <archontis.poli...@aalto.fi> >>> Subject: Re: [Sursound] Enquiry on upmixing from 1st order ambisonics to >>> 3rd order ambisonics. >>> Date: 22 February 2019 18:15:00 GMT >>> To: Surround Sound discussion group <sursound@music.vt.edu> >>> >>> >>> Hi David, >>> >>> These upmixing methods extract a lot of information from the FOA recording >>> that is then re-used to essentially “synthesize" the HOA signals, with a >>> spatial resolution that would not be possible with the FOA recordings. They >>> are “active” in that sense, and signal-dependent, compared to the “passive" >>> classical ambisonic decoding. Their success depends of course on how >>> effective is their underlying model and how robustly they are implemented. >>> >>> In that sense there isn’t necessarily a large benefit in parametric >>> upmixing from FOA to 3rd-order, compared to parametric decoding for >>> playback, since these methods can also upmix directly from FOA to, say, 40 >>> speakers or headphones, with their maximum sharpness. However, the HOA >>> upmixing could be useful for people that are working with a HOA processing >>> pipeline, and they want to integrate FOA or lower-order material seamlessly. >>> >>> Regards, >>> Archontis Politis >> >> > > >> Very few people have access to microphones beyond FOA, so that in a live >> recording a number of close microphones could be mixed in third order, with >> a FOA microphone as a "room" mic. > > > I don't understand these permanent "objections". > > The Octomic and the Zylia ZM-1 microphones are available and well priced. > Why not just doing some investment (for a longer time), and just buy one of > these? > > COMPASS seems to be able to upsample 2nd and 3rd order to higher, so you seem > to have always some > advantage. > (To be confirmed after COMPASS gets available, of course.) > > From persons claiming to be professional recordists I would actually expect > to use up-to-date equipment. > (The mentioned microphones don't cost more or much more than some > professional cameras - just to compare. > I expect that a real photographer... you know what I mean.) > > Best, > > Stefan Schreiber > _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
