Bit Depth

{
  "asOf": "2026-10-11T14:38:33.327Z",
  "bits": 16,
  "bitsNeededExact": 16,
  "bitsNeededRoundedUp": 16,
  "dbPerBit": 6.0206,
  "degraded": false,
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "dynamicRangeDb": 96.3296,
  "fullScaleVolts": 1,
  "levels": 65536,
  "lsbDbfs": -90.309,
  "lsbVolts": 0.000030517578125,
  "notChecked": [
    "real converters, whose effective number of bits (ENOB) is several bits lower than the nominal depth",
    "dither and noise shaping, which trade noise for linearity and can move the effective floor",
    "…2 more"
  ],
  "reasons": [
    "Each extra bit adds 6.02 dB (a factor of two in amplitude).",
    "The +1.76 dB is the ratio of a full-scale sine's RMS to the quantization noise RMS (step/sqrt 12)."
  ],
  "signedMax": 32767,
  "signedMin": -32768,
  "source": "Ideal quantizer theory: SNR = 6.0206 N + 1.76 dB for a full-scale sine, computed locally",
  "summary": "16-bit PCM has 65536 levels and a theoretical SNR of 98.0896 dB (96.3296 dB range).",
  "theoreticalSnrFullScaleSineDb": 98.0896,
  "verdict": "COMPUTED"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://audio-calc.x402tookit.com/bit-depth?bits=16'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://audio-calc.x402tookit.com/bit-depth?bits=16' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Faudio-calc.x402tookit.com%2Fbit-depth
const res = await pay("https://audio-calc.x402tookit.com/bit-depth?bits=16");
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://audio-calc.x402tookit.com/bit-depth?bits=16")
    print(res.status_code, res.text)