I'm kind of confused how I can convert XyloMonitor output to predicted class, for our case, its 0 to 7 for digits 0 to 7 as we can only use 8 output node. Could you kindly help me with this?

[bbkrsddq1]

I was going through this tutorial: https://github.com/synsense/OpenNeuromorphic_26042023/blob/main/live-coding-script-shd.ipynb and trying to implement Xylo Monitor for digit classification using onboard microphone, using the following code:

Find and connect to a Xylo A2 HDK
xylo_hdk_nodes, modules, versions = find_xylo_hdks()
print(xylo_hdk_nodes)

if len(xylo_hdk_nodes) == 0 or versions[0] != 'syns61201':
assert False, 'This tutorial requires a connected Xylo A2 HDK to demonstrate.'
else:
db = xylo_hdk_nodes[0]

Use XyloMonitor to deploy to the HDK
You need to wait 45s until the AFE auto-calibration is done

output_mode = "Vmem"
amplify_level = "low"
hibernation = False
DN = False
T = 250

while True:
modMonitor = x.XyloMonitor(db, config, dt=net_dt, output_mode=output_mode, amplify_level=amplify_level, hibernation_mode=hibernation, divisive_norm=DN)
output, _, _ = modMonitor(input_data=np.zeros((T, Nin)), record = False)
print(output)

However, I have 2 issues with this. First issue is when I print the output, I got following result. Now I'm kind of confused how I can convert this output to predicted class, for our case, 0 to 7 for digits 0 to 7 as we can only use 8 output node. Could you kindly help me with this?

Side note: When I was running this code, I was playing spoken sounds of digits near the board. However, I'm not sure whether XyloMonitor takes these values from those sound or not, because when I didn't play those sounds, it still get non-zero values instead of 0 values.

Configuring AFE...
Configured AFE

[
[57, -59],
[47, -106],
[38, -110],
[30, -97],
[62, -123],
[66, -179],
[5, -211],
[-18, -196],
[-24, -166],
[-23, -133],
[-35, -157],
[-35, -146],
[46, -126],
[72, -80],
[63, -62],
[37, -100],
[23, -102],
[31, -97],
[69, -126],
[59, -174],
[-6, -203],
[-29, -188],
[-11, -138],
[-22, -163],
[-23, -152],
[33, -180],
[50, -168],
[51, -142],
[46, -114],
[23, -142],
[27, -142],
[23, -102],
[81, -75],
[77, -109],
[66, -107],
[54, -93],
[58, -83],
[53, -69],
[45, -54],
[39, -103],
[-9, -140],
[-28, -131],
[-32, -111],
[-45, -143],
[-43, -137],
[-37, -117],
[47, -97],
[73, -77],
[58, -113],
[23, -161],
[8, -158],
[16, -145],
[17, -121],
[61, -144],
[70, -135],
[65, -114],
[55, -91],
[60, -79],
[39, -118],
[5, -166],
[-8, -163],
[42, -193],
[56, -179],
[39, -205],
[29, -188],
[37, -166],
[36, -136],
[31, -108],
[72, -132],
[78, -124],
[71, -105],
[60, -84],
[63, -74],
[42, -114],
[7, -163],
[11, -169],
[27, -157],
[15, -186],
[-23, -158],
[-34, -127],
[-33, -99],
[-23, -58],
[43, -99],
[41, -151],
[35, -151],
[29, -132],
[22, -170],
[-37, -196],
[-54, -181],
[8, -146],
[30, -114],
[35, -87],
[33, -66],
[5, -160],
[-6, -175],
[-9, -158],
[-8, -131],
[54, -99],
[71, -136],
[69, -133],
[37, -163],
[21, -154],
[13, -131],
[-40, -154],
[32, -199],
[55, -191],
[58, -164],
[52, -133],
[28, -157],
[31, -154],
[-25, -167],
[-42, -151],
[18, -120],
[23, -147],
[23, -138],
[-8, -138],
[-19, -120],
[-20, -98],
[-18, -77],
[31, -107],
[61, -113],
[65, -100],
[59, -83],
[35, -119],
[0, -166],
[-13, -162],
[38, -191],
[37, -231],
[0, -201],
[-14, -164],
[-17, -130],
[0, -108],
[-9, -140],
[-10, -134],
[52, -109],
[69, -85],
[67, -65],
[15, -124],
[-60, -164],
[-20, -153],
[-2, -129],
[6, -103],
[8, -138],
[7, -119],
[68, -91],
[82, -69],
[78, -51],
[32, -138],
[15, -158],
[8, -145],
[65, -116],
[112, -96],
[82, -133],
[19, -172],
[43, -153],
[47, -126],
[43, -100],
[64, -129],
[75, -177],
[39, -157],
[21, -129],
[12, -102],
[-42, -127],
[-8, -133],
[67, -112],
[88, -90],
[85, -70],
[74, -53],
[38, -150],
[20, -167],
[-21, -137],
[-33, -108],
[28, -78],
[47, -56],
[34, -94],
[40, -104],
[37, -95],
[32, -79],
[26, -63],
[67, -97],
[90, -105],
[65, -143],
[48, -139],
[36, -120],
[-11, -200],
[-27, -205],
[26, -147],
[43, -107],
[29, -132],
[-34, -158],
[-53, -147],
[-38, -132],
[-28, -110],
[-21, -87],
[31, -115],
[47, -111],
[48, -95],
[35, -134],
[27, -131],
[6, -167],
[-2, -159],
[72, -138],
[68, -161],
[58, -149],
[48, -125],
[23, -153],
[12, -144],
[6, -123],
[80, -102],
[60, -183],
[45, -190],
[2, -153],
[-15, -119],
[-4, -99],
[-15, -132],
[22, -171],
[34, -164],
[35, -141],
[32, -114],
[4, -200],
[-7, -207],
[12, -127],
[64, -100],
[76, -77],
[71, -58],
[27, -100],
[8, -103],
[0, -91],
[14, -144],
[-36, -179],
[-50, -169],
[-48, -143],
[-41, -115],
[28, -146],
[50, -139],
[53, -119],
[48, -96],
[40, -75],
[17, -111],
[7, -110],
[18, -103],
[81, -82],
[95, -63],
[51, -150],
[44, -171],
[-19, -191],
[-40, -174],
[-43, -145],
[7, -163],
[26, -149]
]

My second issue is I got the following value error, However, it seems straight forward to me. It because you didn't update the chip version in your module.

---

ValueError Traceback (most recent call last)
Cell In[96], line 11
8 T = 250
10 while True:
---> 11 modMonitor = x.XyloMonitor(db, config, dt=net_dt, output_mode=output_mode, amplify_level=amplify_level, hibernation_mode=hibernation, divisive_norm=DN)
12 output, _, _ = modMonitor(input_data=np.zeros((T, Nin)), record = False)
13 print(output)

File ~/.local/lib/python3.8/site-packages/rockpool/nn/modules/module.py:688, in PostInitMetaMixin.call(cls, *args, **kwargs)
686 def call(cls, *args, **kwargs):
687 # - Instantiate the object
--> 688 obj = super().call(*args, **kwargs)
690 # - Check for a __post_init__ method
691 if hasattr(cls, "post_init"):

File ~/.local/lib/python3.8/site-packages/rockpool/devices/xylo/syns61201/xylo_monitor.py:174, in XyloMonitor.init(self, device, config, afe_config, dt, output_mode, amplify_level, change_count, main_clk_rate, hibernation_mode, divisive_norm, divisive_norm_params, calibration_params, read_register, *args, **kwargs)
170 self._chip_version, self._chip_revision = hdkutils.read_afe2_module_version(
171 self._afe_read_buffer, self._afe_write_buffer
172 )
173 if self._chip_version != 1 or self._chip_revision != 0:
--> 174 raise ValueError(
175 f"AFE version is {(self._chip_version, self._chip_revision)}; expected (1, 0)."
176 )
178 # - Change event count number of AFE
179 if change_count is not None:

ValueError: AFE version is (2, 0); expected (1, 0).