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DTMF Dialing Tones (WAV)

A DTMF (touch-tone) dialing sequence dialing a reserved 555-01xx number: each digit is the standard dual-tone pair. A fixture for testing DTMF decoders, Goertzel detectors, and tone analysis.

File: WAV · Dtmf · 44100 Hz
Use case: Audio analysis

DTMF Sequence: *9#

Synthetic DTMF tone sequence for digits “*9#”. Pair with the transcript JSON.

File: WAV · Dtmf · 16000
Use case: ASR testingAudio analysis· Paired fixture

DTMF Sequence: 042

Synthetic DTMF tone sequence for digits “042”. Pair with the transcript JSON.

File: WAV · Dtmf · 16000
Use case: ASR testingAudio analysis· Paired fixture

DTMF Sequence: 1234

Synthetic DTMF tone sequence for digits “1234”. Pair with the transcript JSON.

File: WAV · Dtmf · 16000
Use case: ASR testingAudio analysis· Paired fixture

DTMF Sequence: 13579

Synthetic DTMF tone sequence for digits “13579”. Pair with the transcript JSON.

File: WAV · Dtmf · 16000
Use case: ASR testingAudio analysis· Paired fixture

DTMF Sequence: 567890

Synthetic DTMF tone sequence for digits “567890”. Pair with the transcript JSON.

File: WAV · Dtmf · 16000
Use case: ASR testingAudio analysis· Paired fixture

DTMF Transcript: *9# (JSON)

Ground-truth digit transcript for the DTMF sequence *9#.

File: JSON · Dtmf
Use case: ASR testing· Paired fixture

DTMF Transcript: 042 (JSON)

Ground-truth digit transcript for the DTMF sequence 042.

File: JSON · Dtmf
Use case: ASR testing· Paired fixture

DTMF Transcript: 1234 (JSON)

Ground-truth digit transcript for the DTMF sequence 1234.

File: JSON · Dtmf
Use case: ASR testing· Paired fixture

DTMF Transcript: 13579 (JSON)

Ground-truth digit transcript for the DTMF sequence 13579.

File: JSON · Dtmf
Use case: ASR testing· Paired fixture

DTMF Transcript: 567890 (JSON)

Ground-truth digit transcript for the DTMF sequence 567890.

File: JSON · Dtmf
Use case: ASR testing· Paired fixture

Duplicate Field Names (intentionally corrupt HTML)

Intentionally corrupt. Three pairs of unrelated controls share a name - two email inputs, two dates and a select that collides with a text input - so the submitted body carries the same key twice with different meanings. Use it to check that a parser reports the collision instead of silently keeping the last value.

File: HTML · Software Quality · 6 fields
Use case: Form testingForm parsing+3· Conversion set

DXF: CAD Cube (line geometry)

A 10 mm cube drawn as 12 DXF LINE entities: the AutoCAD interchange format, written with ezdxf. For testing DXF parsers and CAD conversion.

File: DXF · Cad
Use case: Conversion testing

E-commerce Customers (CSV, 500 rows)

A realistic e-commerce customer directory (500 rows): part of a relational dataset (products, customers, orders) with CSV, JSON, SQL, and Parquet twins for testing joins, imports, and conversion.

File: CSV · Ecommerce · 500 rows
Use case: Data importConversion testing+1· Conversion set

E-commerce Customers (JSON, 500 records)

The e-commerce customers table as a JSON array: the format twin of the CSV, for import and conversion testing.

File: JSON · Ecommerce · 500 records
Use case: Data importConversion testing· Conversion set

E-commerce Database Schema (SQL)

A relational SQL schema (products, customers, orders with primary and foreign keys) plus sample INSERTs: the DDL twin of the e-commerce dataset, for testing schema import and migrations.

File: SQL · Ecommerce
Use case: Data importConversion testing

E-commerce Orders (CSV, 2000 rows)

A realistic e-commerce order lines (customer_id → customers, product_id → products) (2000 rows): part of a relational dataset (products, customers, orders) with CSV, JSON, SQL, and Parquet twins for testing joins, imports, and conversion.

File: CSV · Ecommerce · 2,000 rows
Use case: Data importConversion testing+1· Conversion set

E-commerce Orders (JSON, 2000 records)

The e-commerce orders table as a JSON array: the format twin of the CSV, for import and conversion testing.

File: JSON · Ecommerce · 2,000 records
Use case: Data importConversion testing· Conversion set

E-commerce Orders (Parquet, 2000 rows)

The e-commerce orders table as Apache Parquet: the columnar twin, for testing analytics engines (pandas, DuckDB, Spark).

File: PARQUET · Ecommerce · 2,000 rows
Use case: Data engineeringConversion testing· Conversion set

E-commerce Products (CSV, 200 rows)

A realistic e-commerce product catalogue (200 rows): part of a relational dataset (products, customers, orders) with CSV, JSON, SQL, and Parquet twins for testing joins, imports, and conversion.

File: CSV · Ecommerce · 200 rows
Use case: Data importConversion testing+1· Conversion set

E-commerce Products (JSON, 200 records)

The e-commerce products table as a JSON array: the format twin of the CSV, for import and conversion testing.

File: JSON · Ecommerce · 200 records
Use case: Data importConversion testing· Conversion set

E-commerce Products (Parquet, 200 rows)

The e-commerce products table as Apache Parquet: the columnar twin, for testing analytics engines (pandas, DuckDB, Spark).

File: PARQUET · Ecommerce · 200 rows
Use case: Data engineeringConversion testing· Conversion set

Ed25519 Private Key (PEM)

An Ed25519 private key in PKCS#8 PEM, derived from a fixed seed: a published, sample-only modern elliptic-curve key for testing PEM parsers and Ed25519 tooling. Never use it for real.

File: KEY · Security
Use case: Certificate & key testingEditor testing

Ed25519 Private Key (PEM): SAMPLE

Deterministic SAMPLE Ed25519 private key for SSH/TLS tooling tests.

File: KEY · Pki
Use case: Certificate & key testing· Conversion set