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Are audio cassettes FM or AM?
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I know that cassettes store an analog signal, but is the signal Amplitude-Modulated (AM) or Frequency Modulated (FM)?
audio fm am
asked 35 mins ago
I. Renk
1183
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up vote
2
down vote
favorite
I know that cassettes store an analog signal, but is the signal Amplitude-Modulated (AM) or Frequency Modulated (FM)?
audio fm am
asked 35 mins ago
I. Renk
1183
add a comment |Â
up vote
2
down vote
favorite
up vote
2
down vote
favorite
I know that cassettes store an analog signal, but is the signal Amplitude-Modulated (AM) or Frequency Modulated (FM)?
audio fm am
asked 35 mins ago
I. Renk
1183
I know that cassettes store an analog signal, but is the signal Amplitude-Modulated (AM) or Frequency Modulated (FM)?
audio fm am
audio fm am
asked 35 mins ago
I. Renk
1183
asked 35 mins ago
I. Renk
1183
asked 35 mins ago
I. Renk
1183
asked 35 mins ago
I. Renk
1183
asked 35 mins ago
I. Renk
1183
1183
add a comment |Â
add a comment |Â
3 Answers
3
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2
down vote
accepted
Neither, there is no modulation involved. The magnetization on the media is directly (and hopefully fairly linearly) related to the waveform amplitude.
answered 32 mins ago
Phil G
5916
Thank you! Stupid me didn't even consider that...
– I. Renk
31 mins ago
1
That said, although what ends up on the tape is linear, it is recorded onto the tape using some bias signal to get the resulting signal in a linear region of the magnetization curve, and a (usually) AC bias signal is also included in the signal going to the head. There shoudn't be any intermodulation between the two though. en.wikipedia.org/wiki/Tape_bias
– Phil G
24 mins ago
add a comment |Â
up vote
4
down vote
It is neither, the signal is recorded as a magnetized pattern without any form of modulation. This can give an impression of how that works:
I got that from here.
See, no modulation needed, the amount of magnetic flux is proportional to the actual audio signal.
Some HiFi Stereo Video recorders do use FM to record the audio though.
answered 29 mins ago
Bimpelrekkie
44.1k23996
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up vote
0
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Analog tape recording for audio cassette doesnt require modulation. But since magnetization ability of the particles on the tape does not have linear response at low signal levels of the audio to be recorded, poor response will result during playback.
To prevent this, technique called biasing is applied. This creates very linear response of magnetization for the entire dynamic range required for high fidelity audio.
"When recording, magnetic tape has a nonlinear response as determined by its coercivity. Without bias, this response results in poor performance especially at low signal levels. A recording signal which generates a magnetic field strength less than tape's coercivity is unable to magnetise the tape and produces little playback signal. Bias increases the signal quality of most audio recordings significantly by pushing the signal into more linear zones of the tape's magnetic transfer function." Sourced from wikipedia.
So, you may have confused between this high frequency AC bias used in audio recording with modulation.
answered 20 mins ago
soosai steven
1,2921510
add a comment |Â
3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
accepted
Neither, there is no modulation involved. The magnetization on the media is directly (and hopefully fairly linearly) related to the waveform amplitude.
answered 32 mins ago
Phil G
5916
Thank you! Stupid me didn't even consider that...
– I. Renk
31 mins ago
1
That said, although what ends up on the tape is linear, it is recorded onto the tape using some bias signal to get the resulting signal in a linear region of the magnetization curve, and a (usually) AC bias signal is also included in the signal going to the head. There shoudn't be any intermodulation between the two though. en.wikipedia.org/wiki/Tape_bias
– Phil G
24 mins ago
add a comment |Â
up vote
2
down vote
accepted
Neither, there is no modulation involved. The magnetization on the media is directly (and hopefully fairly linearly) related to the waveform amplitude.
answered 32 mins ago
Phil G
5916
Thank you! Stupid me didn't even consider that...
– I. Renk
31 mins ago
1
That said, although what ends up on the tape is linear, it is recorded onto the tape using some bias signal to get the resulting signal in a linear region of the magnetization curve, and a (usually) AC bias signal is also included in the signal going to the head. There shoudn't be any intermodulation between the two though. en.wikipedia.org/wiki/Tape_bias
– Phil G
24 mins ago
add a comment |Â
up vote
2
down vote
accepted
up vote
2
down vote
accepted
Neither, there is no modulation involved. The magnetization on the media is directly (and hopefully fairly linearly) related to the waveform amplitude.
answered 32 mins ago
Phil G
5916
Neither, there is no modulation involved. The magnetization on the media is directly (and hopefully fairly linearly) related to the waveform amplitude.
answered 32 mins ago
Phil G
5916
answered 32 mins ago
Phil G
5916
answered 32 mins ago
Phil G
5916
answered 32 mins ago
Phil G
5916
5916
Thank you! Stupid me didn't even consider that...
– I. Renk
31 mins ago
1
That said, although what ends up on the tape is linear, it is recorded onto the tape using some bias signal to get the resulting signal in a linear region of the magnetization curve, and a (usually) AC bias signal is also included in the signal going to the head. There shoudn't be any intermodulation between the two though. en.wikipedia.org/wiki/Tape_bias
– Phil G
24 mins ago
add a comment |Â
Thank you! Stupid me didn't even consider that...
– I. Renk
31 mins ago
1
That said, although what ends up on the tape is linear, it is recorded onto the tape using some bias signal to get the resulting signal in a linear region of the magnetization curve, and a (usually) AC bias signal is also included in the signal going to the head. There shoudn't be any intermodulation between the two though. en.wikipedia.org/wiki/Tape_bias
– Phil G
24 mins ago
Thank you! Stupid me didn't even consider that...
– I. Renk
31 mins ago
Thank you! Stupid me didn't even consider that...
– I. Renk
31 mins ago
1
1
That said, although what ends up on the tape is linear, it is recorded onto the tape using some bias signal to get the resulting signal in a linear region of the magnetization curve, and a (usually) AC bias signal is also included in the signal going to the head. There shoudn't be any intermodulation between the two though. en.wikipedia.org/wiki/Tape_bias
– Phil G
24 mins ago
That said, although what ends up on the tape is linear, it is recorded onto the tape using some bias signal to get the resulting signal in a linear region of the magnetization curve, and a (usually) AC bias signal is also included in the signal going to the head. There shoudn't be any intermodulation between the two though. en.wikipedia.org/wiki/Tape_bias
– Phil G
24 mins ago
add a comment |Â
up vote
4
down vote
It is neither, the signal is recorded as a magnetized pattern without any form of modulation. This can give an impression of how that works:
I got that from here.
See, no modulation needed, the amount of magnetic flux is proportional to the actual audio signal.
Some HiFi Stereo Video recorders do use FM to record the audio though.
answered 29 mins ago
Bimpelrekkie
44.1k23996
add a comment |Â
up vote
4
down vote
It is neither, the signal is recorded as a magnetized pattern without any form of modulation. This can give an impression of how that works:
I got that from here.
See, no modulation needed, the amount of magnetic flux is proportional to the actual audio signal.
Some HiFi Stereo Video recorders do use FM to record the audio though.
answered 29 mins ago
Bimpelrekkie
44.1k23996
add a comment |Â
up vote
4
down vote
up vote
4
down vote
It is neither, the signal is recorded as a magnetized pattern without any form of modulation. This can give an impression of how that works:
I got that from here.
See, no modulation needed, the amount of magnetic flux is proportional to the actual audio signal.
Some HiFi Stereo Video recorders do use FM to record the audio though.
answered 29 mins ago
Bimpelrekkie
44.1k23996
It is neither, the signal is recorded as a magnetized pattern without any form of modulation. This can give an impression of how that works:
I got that from here.
See, no modulation needed, the amount of magnetic flux is proportional to the actual audio signal.
Some HiFi Stereo Video recorders do use FM to record the audio though.
answered 29 mins ago
Bimpelrekkie
44.1k23996
answered 29 mins ago
Bimpelrekkie
44.1k23996
answered 29 mins ago
Bimpelrekkie
44.1k23996
answered 29 mins ago
Bimpelrekkie
44.1k23996
44.1k23996
add a comment |Â
add a comment |Â
up vote
0
down vote
Analog tape recording for audio cassette doesnt require modulation. But since magnetization ability of the particles on the tape does not have linear response at low signal levels of the audio to be recorded, poor response will result during playback.
To prevent this, technique called biasing is applied. This creates very linear response of magnetization for the entire dynamic range required for high fidelity audio.
"When recording, magnetic tape has a nonlinear response as determined by its coercivity. Without bias, this response results in poor performance especially at low signal levels. A recording signal which generates a magnetic field strength less than tape's coercivity is unable to magnetise the tape and produces little playback signal. Bias increases the signal quality of most audio recordings significantly by pushing the signal into more linear zones of the tape's magnetic transfer function." Sourced from wikipedia.
So, you may have confused between this high frequency AC bias used in audio recording with modulation.
answered 20 mins ago
soosai steven
1,2921510
add a comment |Â
up vote
0
down vote
Analog tape recording for audio cassette doesnt require modulation. But since magnetization ability of the particles on the tape does not have linear response at low signal levels of the audio to be recorded, poor response will result during playback.
To prevent this, technique called biasing is applied. This creates very linear response of magnetization for the entire dynamic range required for high fidelity audio.
"When recording, magnetic tape has a nonlinear response as determined by its coercivity. Without bias, this response results in poor performance especially at low signal levels. A recording signal which generates a magnetic field strength less than tape's coercivity is unable to magnetise the tape and produces little playback signal. Bias increases the signal quality of most audio recordings significantly by pushing the signal into more linear zones of the tape's magnetic transfer function." Sourced from wikipedia.
So, you may have confused between this high frequency AC bias used in audio recording with modulation.
answered 20 mins ago
soosai steven
1,2921510
add a comment |Â
up vote
0
down vote
up vote
0
down vote
Analog tape recording for audio cassette doesnt require modulation. But since magnetization ability of the particles on the tape does not have linear response at low signal levels of the audio to be recorded, poor response will result during playback.
To prevent this, technique called biasing is applied. This creates very linear response of magnetization for the entire dynamic range required for high fidelity audio.
"When recording, magnetic tape has a nonlinear response as determined by its coercivity. Without bias, this response results in poor performance especially at low signal levels. A recording signal which generates a magnetic field strength less than tape's coercivity is unable to magnetise the tape and produces little playback signal. Bias increases the signal quality of most audio recordings significantly by pushing the signal into more linear zones of the tape's magnetic transfer function." Sourced from wikipedia.
So, you may have confused between this high frequency AC bias used in audio recording with modulation.
answered 20 mins ago
soosai steven
1,2921510
Analog tape recording for audio cassette doesnt require modulation. But since magnetization ability of the particles on the tape does not have linear response at low signal levels of the audio to be recorded, poor response will result during playback.
To prevent this, technique called biasing is applied. This creates very linear response of magnetization for the entire dynamic range required for high fidelity audio.
"When recording, magnetic tape has a nonlinear response as determined by its coercivity. Without bias, this response results in poor performance especially at low signal levels. A recording signal which generates a magnetic field strength less than tape's coercivity is unable to magnetise the tape and produces little playback signal. Bias increases the signal quality of most audio recordings significantly by pushing the signal into more linear zones of the tape's magnetic transfer function." Sourced from wikipedia.
So, you may have confused between this high frequency AC bias used in audio recording with modulation.
answered 20 mins ago
soosai steven
1,2921510
answered 20 mins ago
soosai steven
1,2921510
answered 20 mins ago
soosai steven
1,2921510
answered 20 mins ago
soosai steven
1,2921510
1,2921510
add a comment |Â
add a comment |Â
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