[PD] tuning an AM radio ideas
Hi all, I was just wondering would anyone here have an idea on a starting point for a patch to simulate tuning in a station on an AM radio. I want to make a virtual radio with say 5 chanels that i can tune between replete with the hissing fizzing in between out of tune bits. Thanks Nick ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] tuning an AM radio ideas
try this: [noise~ ][number box( || [expr~ pow($v1,$f2)] | [outlet~] ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] tuning an AM radio ideas
hi Nick a possibly stupid, unrealistic and very untested idea comes to my mind: why not build a real AM radio in pd? in a subpatch with a very high samplingrate (using [block~]-object) you could amplitude modulate the signal you want to transmit. with a narrow band-pass filter [bp~], that is tuned to the carrier frequency, you could get back the amplitude of the original signal. maybe you add some [noise~] to simulate cosmic radiowaves. just a few ideas. i would be interested, if this approach has a chance to work roman On Wed, 2006-12-13 at 11:04 +, [EMAIL PROTECTED] wrote: Hi all, I was just wondering would anyone here have an idea on a starting point for a patch to simulate tuning in a station on an AM radio. I want to make a virtual radio with say 5 chanels that i can tune between replete with the hissing fizzing in between out of tune bits. Thanks Nick ___ Der frühe Vogel fängt den Wurm. Hier gelangen Sie zum neuen Yahoo! Mail: http://mail.yahoo.de ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] tuning an AM radio ideas
hi nick again i didn't want to 'steal' your idea, but i found this subject so interesting, that i tried to realize that approach in a pd-patch. the patch needs [abs~] from zexy and [lp8_butt~] from iemlib. the patch has 3 'stations' (three sources modulated on differently tuned carriers) and one 'receiver'. because of the very high sampling rate in the subpatch (1.53MHz, when pd runs with 44100Hz), the patch eats quite a lot of the cpu. surprisingly it sounds a bit like am-radio, though the quality of the received signal is very bad. the choice of the carrier frequencies does have big effect on the typical am-radio artefacts. there are sure some things, that could be improved. maybe you have use for it. cheers roman On Wed, 2006-12-13 at 12:45 +, [EMAIL PROTECTED] wrote: yep, Thats kinda the approach I was thinkin of. Off to read up on AM radio a bit. thanks for the suggestions On 13 Dec 2006, at 11:43, Roman Haefeli wrote: hi Nick a possibly stupid, unrealistic and very untested idea comes to my mind: why not build a real AM radio in pd? in a subpatch with a very high samplingrate (using [block~]-object) you could amplitude modulate the signal you want to transmit. with a narrow band-pass filter [bp~], that is tuned to the carrier frequency, you could get back the amplitude of the original signal. maybe you add some [noise~] to simulate cosmic radiowaves. just a few ideas. i would be interested, if this approach has a chance to work roman On Wed, 2006-12-13 at 11:04 +, [EMAIL PROTECTED] wrote: Hi all, I was just wondering would anyone here have an idea on a starting point for a patch to simulate tuning in a station on an AM radio. I want to make a virtual radio with say 5 chanels that i can tune between replete with the hissing fizzing in between out of tune bits. Thanks Nick #N canvas 627 103 770 301 10; #N canvas 106 425 796 503 radio 0; #X obj 6 10 inlet~; #X obj 12 440 outlet~; #X obj 7 49 +~ 1; #X obj 8 76 *~ 0.5; #X obj 9 98 *~; #X obj 9 309 abs~; #X obj 10 359 hip~ 20; #X obj 8 181 +~; #X obj 173 304 line~; #X obj 184 5 inlet~; #X obj 185 44 +~ 1; #X obj 186 71 *~ 0.5; #X obj 187 93 *~; #X obj 8 289 vcf~ 1000; #X obj 11 413 *~ 100; #X text 75 30 sender1; #X text 260 31 sender2; #X obj 174 419 block~ 8192 1 32; #X obj 363 11 inlet~; #X obj 364 50 +~ 1; #X obj 365 77 *~ 0.5; #X obj 366 99 *~; #X text 456 29 sender3; #X obj 82 185 noise~; #X obj 662 91 inlet; #X text 655 65 tuning frequency; #X text 86 99 carrier; #X text 269 95 carrier; #X text 450 97 carrier; #X obj 9 331 lp8_butt~ 8000; #X obj 428 79 osc~ 150311; #X obj 253 77 osc~ 123080; #X obj 75 82 osc~ 101273; #X obj 81 211 *~ 0.005; #X obj 173 281 pack f 200; #X connect 0 0 2 0; #X connect 2 0 3 0; #X connect 3 0 4 0; #X connect 4 0 7 0; #X connect 5 0 29 0; #X connect 6 0 14 0; #X connect 7 0 13 0; #X connect 8 0 13 1; #X connect 9 0 10 0; #X connect 10 0 11 0; #X connect 11 0 12 0; #X connect 12 0 7 0; #X connect 13 0 5 0; #X connect 14 0 1 0; #X connect 18 0 19 0; #X connect 19 0 20 0; #X connect 20 0 21 0; #X connect 21 0 7 0; #X connect 23 0 33 0; #X connect 24 0 34 0; #X connect 29 0 6 0; #X connect 30 0 21 1; #X connect 31 0 12 1; #X connect 32 0 4 1; #X connect 33 0 7 1; #X connect 34 0 8 0; #X restore 132 80 pd radio; #X obj 132 214 dac~; #X obj 212 145 hsl 128 15 0 1 0 0 empty empty empty -2 -8 0 10 -262144 -1 -1 12700 1; #X obj 132 172 *~; #X obj 315 77 hsl 300 15 9 16 0 0 empty empty tuning_frequency 4 8 1 10 -262144 -1 -1 12600 1; #X floatatom 312 106 8 0 0 0 - - -; #X obj 31 37 adc~ 1; #X obj 117 35 adc~ 3; #X obj 192 37 adc~ 5; #X text 375 106 Hz; #X text 27 16 station1; #X text 110 16 station2; #X text 189 16 station3; #X text 359 61 | 1; #X text 453 60 | 2; #X text 569 61 | 3; #X obj 209 165 t f f; #X obj 209 186 *; #X connect 0 0 3 0; #X connect 2 0 16 0; #X connect 3 0 1 0; #X connect 3 0 1 1; #X connect 4 0 0 3; #X connect 4 0 5 0; #X connect 6 0 0 0; #X connect 7 0 0 1; #X connect 8 0 0 2; #X connect 16 0 17 0; #X connect 16 1 17 1; #X connect 17 0 3 1; ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] tuning an AM radio ideas
This is a neat idea, is this how real AM works for radio? I've always enjoyed the strange 'droid' sounds that come from the blurry points in between signals on the AM dial. ~Kyle On 12/13/06, Roman Haefeli [EMAIL PROTECTED] wrote: hi Nick a possibly stupid, unrealistic and very untested idea comes to my mind: why not build a real AM radio in pd? in a subpatch with a very high samplingrate (using [block~]-object) you could amplitude modulate the signal you want to transmit. with a narrow band-pass filter [bp~], that is tuned to the carrier frequency, you could get back the amplitude of the original signal. maybe you add some [noise~] to simulate cosmic radiowaves. just a few ideas. i would be interested, if this approach has a chance to work roman On Wed, 2006-12-13 at 11:04 +, [EMAIL PROTECTED] wrote: Hi all, I was just wondering would anyone here have an idea on a starting point for a patch to simulate tuning in a station on an AM radio. I want to make a virtual radio with say 5 chanels that i can tune between replete with the hissing fizzing in between out of tune bits. Thanks Nick ___ Der frühe Vogel fängt den Wurm. Hier gelangen Sie zum neuen Yahoo! Mail: http://mail.yahoo.de ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list -- http://theradioproject.com http://perhapsidid.blogspot.com (()()()(()))()()())( (())(())()((( ))(__ _())(()))___ (((000)))oOO ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] tuning an AM radio ideas
Getting there now. Just what I was thinking of. Where to add in a bit of noise is the next thing. Thanks Roman On 13 Dec 2006, at 15:02, Roman Haefeli wrote: hi nick again i didn't want to 'steal' your idea, but i found this subject so interesting, that i tried to realize that approach in a pd-patch. the patch needs [abs~] from zexy and [lp8_butt~] from iemlib. the patch has 3 'stations' (three sources modulated on differently tuned carriers) and one 'receiver'. because of the very high sampling rate in the subpatch (1.53MHz, when pd runs with 44100Hz), the patch eats quite a lot of the cpu. surprisingly it sounds a bit like am-radio, though the quality of the received signal is very bad. the choice of the carrier frequencies does have big effect on the typical am-radio artefacts. there are sure some things, that could be improved. maybe you have use for it. cheers roman On Wed, 2006-12-13 at 12:45 +, [EMAIL PROTECTED] wrote: yep, Thats kinda the approach I was thinkin of. Off to read up on AM radio a bit. thanks for the suggestions On 13 Dec 2006, at 11:43, Roman Haefeli wrote: hi Nick a possibly stupid, unrealistic and very untested idea comes to my mind: why not build a real AM radio in pd? in a subpatch with a very high samplingrate (using [block~]-object) you could amplitude modulate the signal you want to transmit. with a narrow band-pass filter [bp~], that is tuned to the carrier frequency, you could get back the amplitude of the original signal. maybe you add some [noise~] to simulate cosmic radiowaves. just a few ideas. i would be interested, if this approach has a chance to work roman On Wed, 2006-12-13 at 11:04 +, [EMAIL PROTECTED] wrote: Hi all, I was just wondering would anyone here have an idea on a starting point for a patch to simulate tuning in a station on an AM radio. I want to make a virtual radio with say 5 chanels that i can tune between replete with the hissing fizzing in between out of tune bits. Thanks Nick am-radio.pd ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/ listinfo/pd-list ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
