1-18. (canceled)
19. A method for processing an audio signal, comprising the steps of:
a) acquiring a set of data suitable to define an audio signal composed of a sequence of elements, each element comprising a note and playback information related to the note;
b) selecting a frequency shift;
c) generating a first digital audio recording by synthesizing it according to said data set;
d) generating a second digital audio recording by synthesizing each note contained in said data set on the basis of said note, of said playback information and of said frequency shift;
e) selecting a channel of said first audio recording, selecting a channel of said second audio recording, and mixing the two channels in a third audio recording which comprises at least two channels.
20. The method according to claim 19, wherein at least one between said step of generating a first audio recording and said step of generating a second audio recording comprises generating a single-channel audio recording.
21. The method according to claim 19, wherein at least one between said step of generating a first audio recording and said step of generating a second audio recording comprises generating a multichannel, preferably two-channel, audio recording.
22. The method according to claim 19, wherein said step of generating a second audio recording comprises the application of said frequency shift to each note of said set of data suitable to define an audio signal.
23. The method according to claim 19, wherein said data suitable to define an audio signal are a file in the MIDI format.
24. The method according to claim 19, wherein said frequency shift falls in the range from 0.5 Hz to 30 Hz, preferably in the range from 2 Hz to 20 Hz.
25. The method according to claim 19, wherein said first, second and third audio recordings are in a format selected from the group that comprises \u201cway\u201d, \u201cmp3\u201d, \u201cogg\u201d, \u201cxac\u201d, \u201caiff\u201d, \u201caifc\u201d, \u201ciff\u201d, \u201cau\u201d, \u201cvoc\u201d, \u201csnd\u201d, \u201csds\u201d, \u201csmp\u201d, \u201cvox\u201d, \u201cmat\u201d, \u201ctxt\u201d, \u201cflac\u201d, \u201cogg\u201d, \u201cwma\u201d.
26. A system for processing an audio signal, comprising:
a) means for acquiring a set of data suitable to define an audio signal composed of a sequence of elements, each element comprising a note and playback information related to the note;
b) means for selecting a frequency shift;
c) a first synthesizer which is adapted to generate a first digital audio recording on the basis of said data adapted to define an audio signal;
d) a second synthesizer which is adapted to generate a second digital audio recording by synthesizing each note contained in said data set on the basis of said note, of said playback information and of said frequency shift;
e) a mixer which is adapted to select a channel of said first audio recording, select a channel of said second audio recording, and mix the two channels in a third audio recording which comprises at least two channels.
27. The system according to claim 26, wherein at least one between said first synthesizer and said second synthesizer generates a single-channel audio recording.
28. The system according to claim 26, wherein at least one between said first synthesizer and said second synthesizer generates a multichannel, preferably two-channel, audio recording.
29. The system according to claim 26, wherein said second synthesizer comprises means for applying said frequency shift to each note of the audio signal.
30. The system according to claim 26, wherein said data adapted to define an audio signal are a file in the MIDI format.
31. The system according to claim 26, wherein said frequency shift falls within the range from 0.5 Hz to 30 Hz, preferably in the range from 2 Hz to 20 Hz.
32. The system according to claim 26, wherein said first, second and third audio recordings are in a format selected from the group that comprises \u201cway\u201d, \u201cmp3\u201d, \u201cogg\u201d, \u201cxac\u201d, \u201caiff\u201d, \u201caifc\u201d, \u201ciff\u201d, \u201cau\u201d, \u201cvoc\u201d, \u201csnd\u201d, \u201csds\u201d, \u201csmp\u201d, \u201cvox\u201d, \u201cmat\u201d, \u201ctxt\u201d, \u201cflac\u201d, \u201cogg\u201d, \u201cwma\u201d.
33. A multichannel, preferably two-channel, audio recording, comprising an audio track composed of a sequence of musical notes, wherein each note in said sequence is coded in a first channel at a frequency f and each note in said sequence is coded in a second channel at a frequency f+\u0394f.
34. An audio recording which can be obtained by means of claim 33.
35. A videogame comprising digital audio according to claim 33.
36. An audiovisual document comprising digital audio according to claim 33.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A light source comprising:
an emitter of photostimulative light;
a reflector disposed about said emitter so as to reflect light from said emitter towards an outlet end;
a tailored aspheric lens that further collimates the light from said reflector;
a short-pass filter receiving said collimated light and transmitting light from said emitter;
a dielectric concentrator on the other side of said filter, said concentrator receiving said transmitted light and concentrating said light on an exit aperture;
a dielectric emitting optic on the outside of said exit aperture so as to receive said concentrated light; and
a layer of photosensitive phosphor deposited on the outside of said dielectric emission optic, said photosensitive phosphor responsive to said photostimulative light to emit light of a longer wavelength.
2. The light source of claim 1, wherein the emitter of photostimulative light comprises one or more light-emitting diodes.
3. The light source of claim 1, wherein said emitter emits blue light, said short-pass filter is a blue pass filter, and said photosensitive phosphor emits yellow light.
4. The light source of claim 1, wherein said reflector is a collimator.
5. The light source of claim 1, wherein said reflector is conical.
6. The light source of claim 1, wherein the exit aperture is smaller than an effective light-emitting surface of the emitter.
7. The light source of claim 1, said concentrator being rotationally symmetric, with a profile comprising a frontal curve adjacent to said filter and a totally internally reflecting sidewall defining the length of said concentrator by extending from said frontal curve to said, dielectric emission optic, said sidewall having a curved profile tailored to reflect into said dielectric emission optic the edge rays from said reflector, said edge rays defined as those emitted by the edges of said emitter.
8. A light source comprising:
an emitter of photostimulative light;
an optical stage arranged to collect light from the emitter and forward collected light to an exit aperture;
a dielectric emitting optic on the outside of said exit aperture so as to receive said forwarded light; and
a layer of photosensitive phosphor deposited on the outside of said dielectric emission optic, said photosensitive phosphor responsive to said photostimulative light to emit light of a longer wavelength.
9. The light source of claim 8, further comprising a filter between said emitter and said exit aperture and spaced from said emitter, said filter transmitting light from said emitter to said exit aperture, and reflecting light from said phosphor back towards said exit aperture.
10. The light source of claim 9, wherein said optical stage further comprises a collimator between said emitter and said filter and a concentrator between said filter and said exit aperture.
11. The light source of claim 8, wherein said optical stage further comprises a conical reflector disposed about said one or more diodes so as to reflect light from said emitter towards said exit aperture and a tailored aspheric lens that further collimates the light from said reflector.
12. The light source of claim 8, wherein said optical stage further comprises a dielectric concentrator arranged to concentrate said light at said exit aperture, and said dielectric emission optic is optically continuous with said dielectric concentrator through said exit aperture.
13. The light source of claim 8, wherein the emitter of photostimulative light comprises one or more light-emitting diodes.
14. The light source of claim 8, wherein the exit aperture is smaller than an effective light-emitting surface of the emitter.
15. The light source of claim 10, wherein the concentrator is rotationally symmetric, with a profile comprising a frontal curve adjacent to said filter and a totally internally reflecting sidewall defining the length of said concentrator by extending from said frontal curve to said dielectric emission optic, said sidewall having a curved profile tailored to reflect into said dielectric emission optic the edge rays from said collimator, said edge rays defined as those emitted by the edges of said emitter.