可以给我一张dtmf生成器吗
时间: 2023-12-15 11:06:20 浏览: 32
当然可以,以下是一个基于Python的DTMF生成器示例代码:
```python
import numpy as np
import scipy.signal as signal
import matplotlib.pyplot as plt
# DTMF frequencies
freq = np.array([697, 770, 852, 941, 1209, 1336, 1477])
# DTMF characters
chars = np.array([['1', '2', '3', 'A'],
['4', '5', '6', 'B'],
['7', '8', '9', 'C'],
['*', '0', '#', 'D']])
# Sampling frequency
fs = 8000
def dtmf_tone(f1, f2, duration):
"""
Generate a DTMF tone with frequency f1 and f2 for the specified duration.
"""
t = np.arange(0, duration, 1/fs)
x = np.sin(2*np.pi*f1*t) + np.sin(2*np.pi*f2*t)
return x
# Generate DTMF tones for all characters
tones = {}
for i in range(4):
for j in range(4):
f1 = freq[i]
f2 = freq[j+4]
char = chars[i][j]
tone = dtmf_tone(f1, f2, 0.5)
tones[char] = tone
# Generate a sequence of DTMF tones for a given string
def dtmf_sequence(s):
"""
Generate the DTMF sequence for the given string.
"""
seq = []
for c in s:
if c in tones:
seq.append(tones[c])
return np.concatenate(seq)
# Generate a DTMF sequence for the phone number 1234567890
seq = dtmf_sequence("1234567890")
# Plot the DTMF sequence
plt.plot(seq)
plt.xlabel('Time')
plt.ylabel('Amplitude')
plt.title('DTMF Sequence')
plt.show()
# Play the DTMF sequence
signal.playseq(seq, fs)
```
这个代码会生成一系列 DTMF 音调,可以根据需要进行修改。你可以使用 `dtmf_sequence` 函数来生成特定字符串的 DTMF 序列,然后使用 `signal.playseq` 函数将其播放出来。你也可以将其保存为 WAV 文件进行进一步处理。